Income Taxes - Provision for Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal	$ (93)	$ (210)	$ 712
State	0	0	0
Total current	(93)	(210)	712
Deferred:
Federal	8,027	(10,755)	(4,600)
State	2,467	(1,996)	(418)
Total deferred	10,494	(12,751)	(5,018)
Increase (decrease) in valuation allowance for deferred tax assets	0	(11,000)	11,000
Total income taxes	$ 10,401	$ (23,961)	$ 6,694