Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Anti-dilutive shares) (Details)

v3.2.0.727
Summary of Significant Accounting Policies (Anti-dilutive shares) (Details) - shares
shares in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Weighted Average Number Diluted Shares Outstanding Adjustment 0 0 0 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 2,986 2,112 2,986 2,112
Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 10 35 10 35
Stock-settled stock appreciation rights (SARs) [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1,041 1,276 1,041 1,276
Restricted stock/units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1,747 613 1,747 613
Performance contingent SARs [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 188 188 188 188