Summary of Significant Accounting Policies Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Other comprehensive income [Abstract]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Reclassification to Earnings, before Tax	$ 1,777		$ (3,865)		$ 20,707
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Reclassification to Earnings, Tax	(662)		1,601		(7,710)
Reclassification to earnings	1,115		(2,264)		12,997
Other Comprehensive Income (Loss), Minimum Pension Liability Net Adjustment, before Tax	4,005		(3,909)		(2,779)
Other Comprehensive Income (Loss), Minimum Pension Liability, Tax	1,522		(1,439)		(984)
Pension liability adjustment	$ 2,483	[1]	$ (2,470)	[1]	$ (1,795)	[1]

[1] mounts are reclassified to General and administrative expense on the Company's consolidated statements of operations. The net of tax effect of the reclassification was approximately $768,000 in 2013. The accompan