Income Taxes - Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Net deferred tax assets	$ 11,000,000		$ 12,700,000
Deferred tax assets, valuation allowance	0		0
Unrecognized tax benefits	50,000
Income tax expense	$ 1,903,000	$ 1,159,000
Effective income tax rate, percent	16.90%	12.40%