Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income tax expense	$ 2,533	$ 2,109	$ 7,122	$ 5,453
Effective tax rate (as a percent)	35.80%	37.20%	35.90%	36.40%