Derivatives Derivative Effect on Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Reclassification adjustment for cash flow hedges (including de-designated hedges)	$ 1,442	$ 2,583	$ 5,339	$ 11,379
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	4,026		4,026
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			4,156
Dedesignated cash flow hedge amortization	1,442	2,583	5,339	2,583
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 0	$ 0	$ 0	$ 8,796