Income Taxes Unrecognized Tax Benefits Rollforward (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning	$ 31,570	$ 21,730
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	280	1,300
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	270	15,340
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	(2,050)	(4,310)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	0	0
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	(2,870)	(2,490)
Unrecognized Tax Benefits, Ending	$ 27,200	$ 31,570