Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 1,900	$ 1,900	$ 3,900	$ 3,900
Interest expense	$ 16	$ 16	$ 32	$ 32