Income Tax Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income tax expense	$ 80	$ 144	$ (136)	$ (195)
Effective income tax rate	0.90%		(3.80%)
Federal statutory income tax rate			34.00%