Investments in Marketable Securities (Held to Maturity Securities, by Maturity) (Details) (USD $)
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Mar. 31, 2015
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Dec. 31, 2014
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Schedule of Held-to-maturity Securities [Line Items] | ||
Available-for-sale Securities | $ 108,000us-gaap_AvailableForSaleSecurities | $ 107,000us-gaap_AvailableForSaleSecurities |
Letters of Credit Outstanding, Amount | 1,400,000us-gaap_LettersOfCreditOutstandingAmount | |
Held-to-maturity Securities, Current | 316,000us-gaap_HeldToMaturitySecuritiesCurrent | 534,000us-gaap_HeldToMaturitySecuritiesCurrent |
Held-to-maturity Securities, Noncurrent | 1,270,000us-gaap_HeldToMaturitySecuritiesNoncurrent | 1,057,000us-gaap_HeldToMaturitySecuritiesNoncurrent |
Held-to-maturity Securities, Total | 1,586,000us-gaap_HeldToMaturitySecurities | 1,591,000us-gaap_HeldToMaturitySecurities |
Mutual Funds [Member] | ||
Schedule of Held-to-maturity Securities [Line Items] | ||
Available-for-sale Securities |
60,000us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_EquityFundsMember |
59,000us-gaap_AvailableForSaleSecurities / us-gaap_DebtSecurityAxis = us-gaap_EquityFundsMember |
Cash/Money Market Accounts [Member] | ||
Schedule of Held-to-maturity 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 |
82,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
204,000us-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, Total |
82,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
204,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_MoneyMarketFundsMember |
US Treasury Securities [Member] | ||
Schedule of Held-to-maturity Securities [Line Items] | ||
Held-to-maturity Securities, Current |
105,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
105,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
Held-to-maturity Securities, Noncurrent |
1,178,000us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
965,000us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
Held-to-maturity Securities, Total |
1,283,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
1,070,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_USTreasurySecuritiesMember |
US Government Agencies Securities [Member] | ||
Schedule of Held-to-maturity Securities [Line Items] | ||
Held-to-maturity Securities, Current |
129,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
225,000us-gaap_HeldToMaturitySecuritiesCurrent / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
Held-to-maturity Securities, Noncurrent |
92,000us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
92,000us-gaap_HeldToMaturitySecuritiesNoncurrent / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
Held-to-maturity Securities, Total |
$ 221,000us-gaap_HeldToMaturitySecurities / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember |
$ 317,000us-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 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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