Income Taxes (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
Income Tax Disclosure [Abstract]
Income tax expense	$ 2,614	$ 1,830	$ 4,589	$ 3,344
Effective tax rate (as a percent)	35.90%	35.40%	36.00%	35.80%