Income Taxes Income Taxes - Unrecognized Tax Benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefit, beginning of period	$ 8,565	$ 2,109	$ 2,926
Additions for tax positions related to the current year	190	0	0
Additions for tax positions of prior years	207	7,390	0
Reductions for tax positions of prior years	(8,380)	(934)	(817)
Unrecognized tax benefit, end of period	$ 582	$ 8,565	$ 2,109