Fair Value Measurements - Schedule of Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - Level 3 - Recurring basis - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Securities available for sale, at fair value
Level 3 Financial Instruments Measured at Fair Value
Beginning balance	$ 3,071	$ 3,046	$ 3,059	$ 3,040
Total gains:
Included in other comprehensive income	(1)	5	11	11
Purchases, sales, issuances and settlements:
Purchases	0	0	0	0
Transfer in and/or out of Level 3	0	0	0	0
Ending balance	3,070	3,051	3,070	3,051
Change in unrealized gains relating to assets still held at the reporting date	1	(5)	(11)	(11)
State tax credits held for sale, at fair value
Level 3 Financial Instruments Measured at Fair Value
Beginning balance	10,286	14,900	11,689	16,491
Total gains:
Total gains:	66	142	194	260
Purchases, sales, issuances and settlements:
Sales	(387)	(57)	(1,918)	(1,766)
Ending balance	9,965	14,985	9,965	14,985
Change in unrealized gains relating to assets still held at the reporting date	$ (36)	$ (130)	$ (310)	$ 204