Income Taxes - Provision for Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Current:
Federal	$ (134)	$ 45
State	0	0
Total current	(134)	45
Deferred:
Federal	4,324	1,196
State	1,016	376
Total deferred	5,340	1,572
Increase (decrease) in valuation allowance for deferred tax assets	0	(11,000)
Total income taxes	$ 5,206	$ (9,383)