Changes in Accumulated Other Comprehensive Income - Changes in AOCI (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (28,500)	[1]
Other comprehensive income before reclassifications	1,510	[1]
Amounts reclassified from accumulated other comprehensive income	11,982	[1],[2]
Net current-period other comprehensive income	13,492	[1]	508		4,700
Ending balance	(15,008)	[1]	(28,500)	[1]
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(25,749)	[1]
Other comprehensive income before reclassifications	(1,246)	[1]
Amounts reclassified from accumulated other comprehensive income	11,982	[1],[2]
Net current-period other comprehensive income	10,736	[1]
Ending balance	(15,013)	[1]
Cumulative Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(2,751)	[1]
Other comprehensive income before reclassifications	2,756	[1]
Amounts reclassified from accumulated other comprehensive income	0	[1],[2]
Net current-period other comprehensive income	2,756	[1]
Ending balance	$ 5	[1]

[1] All amounts are net of tax. Amounts in parentheses indicate debits.

[2] See Reclassifications Out of Accumulated Other Comprehensive Income table below for reclassification details.