Income Taxes - Components of Income Tax Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Federal	$ 35	$ 116	$ 35	$ 90
State	10	17	10	10
Tax expense	$ 45	$ 133	$ 45	$ 100