Net Income per Share (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net Income per Share [Abstract]
Net income	[1]	$ 389	$ 5,853	$ 7,803	$ 12,015
Less earnings allocated to RSUs		(16)	(157)	(304)	(315)
Net income available to common shareholders		$ 373	$ 5,696	$ 7,499	$ 11,700

[1] There is no material difference between net income and comprehensive income