Accumulated Other Comprehensive Income - Reclassifications Out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	$ 222	$ 237	$ 588	$ 547
Income taxes	(1,733)	(1,018)	(3,518)	(2,390)
Net income	4,088	2,880	8,216	6,395
Realized gain on sale of securities [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	222	237	588	547
Income taxes	(78)	(82)	(206)	(191)
Net income	$ 144	$ 155	$ 382	$ 356