Income Taxes Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Current federal income tax expense									$ 8,057	$ 4,838	$ 5,097
Current state income tax expense									1,558	1,276	1,076
Deferred federal income tax expense									112	608	1,044
Deferred state income tax expense									(30)	(73)	103
Income tax expense	$ 2,596	$ 2,466	$ 2,361	$ 2,274	$ 147	$ 2,362	$ 2,181	$ 1,959	$ 9,697	$ 6,649	$ 7,320