Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ 2,684	$ 5,664	$ 5,320	$ 8,474
Effective income tax rate excluding discrete items			37.60%	40.50%