Investments in Marketable Securities (Details) (USD $)
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Dec. 31, 2014
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Dec. 31, 2013
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Schedule of Available-for-sale Securities [Line Items] | ||
Available-for-sale Securities | $ 107,000us-gaap_AvailableForSaleSecurities | $ 103,000us-gaap_AvailableForSaleSecurities |
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax | 16,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 16,000us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax |
Letters of Credit Outstanding, Amount | 1,400,000us-gaap_LettersOfCreditOutstandingAmount | 2,000,000us-gaap_LettersOfCreditOutstandingAmount |
Held-to-maturity Securities, Current | 534,000us-gaap_HeldToMaturitySecuritiesCurrent | 1,858,000us-gaap_HeldToMaturitySecuritiesCurrent |
Held-to-maturity Securities, Noncurrent | 1,057,000us-gaap_HeldToMaturitySecuritiesNoncurrent | 370,000us-gaap_HeldToMaturitySecuritiesNoncurrent |
Held-to-maturity Securities | 1,591,000us-gaap_HeldToMaturitySecurities | 2,228,000us-gaap_HeldToMaturitySecurities |
Equity Funds [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Available-for-sale Securities |
59,000us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_EquityFundsMember |
55,000us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_EquityFundsMember |
Money Market Funds [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Available-for-sale Securities |
48,000us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
48,000us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
Held-to-maturity Securities, Current |
204,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
116,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
Held-to-maturity Securities, Noncurrent |
0us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
0us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
Held-to-maturity Securities |
204,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
116,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
US Treasury Securities [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Held-to-maturity Securities, Current |
105,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
1,360,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
Held-to-maturity Securities, Noncurrent |
965,000us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
370,000us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
Held-to-maturity Securities |
1,070,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
1,730,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
US Government Agencies Debt Securities [Member] | ||
Schedule of Available-for-sale Securities [Line Items] | ||
Held-to-maturity Securities, Current |
225,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
382,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
Held-to-maturity Securities, Noncurrent |
92,000us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
0us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
Held-to-maturity Securities |
$ 317,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
$ 382,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
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- Definition
Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity, expected to be converted to cash, sold or exchanged within one year or the normal operating cycle. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity, not expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. No definition available.
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