Income Taxes Unrecognized tax benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits		$ 34,786	$ 34,786
Unrecognized Tax Benefits	4,265	2,071
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	0	0
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	4,265	0
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	(2,540)	0
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	(32,246)	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		6,200
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		1,369
Unrecognized Tax Benefits, Income Tax Penalties Expense	$ 835	$ 141