Income Taxes - Valuation Allowance (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended									12 Months Ended			30 Months Ended	36 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ 7,236	$ 38,500	$ 7,327	$ 7,407	$ 7,257	$ (38,531)	$ 811	$ 1,614	$ 3,471	$ 29,227	$ (32,635)	$ (7,701)	$ 43,900	$ (11,109)
Goodwill impairment								4,900		0	0	4,944		4,944
Tax loss position										$ 29,227	$ (32,635)	$ (2,757)		$ (6,165)
Cumulative tax loss position										3 years