Investments - Summary of Unrealized Loss Positions (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) position item	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) position item	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) position
Investments in an unrealized loss position
Total temporary impairment	$ 338		$ 338
Fair Value, AFS and HTM
Less than 12 months, Fair Value	12,022		12,022		$ 55,314
12 months or more, Fair Value	19,431		19,431		17,421
Unrealized Loss, AFS and HTM
Less than 12 months, Unrealized Loss	(89)		(89)		(457)
12 months or more, Unrealized Loss	(249)		(249)		$ (356)
Available-for-sale Securities
Sales of investment securities available-for-sale	18,300	$ 0	39,527	$ 11,484
Gains on the sale of investments available-for-sale	224	0	605	121
Losses on the sale of investments available-for-sale	2	0	2	0
Held-to-maturity Securities [Abstract]
Proceeds from sale of held to maturity securities	0	421		421
Gain on sale of securities	$ 222	$ 5	$ 603	$ 126
U.S. Agency securities
Description and number of positions
Number of investments in an unrealized loss position, AFS	9		9		9
Fair Value, AFS
Less than 12 months, Fair Value	$ 10,382		$ 10,382		$ 28,351
Unrealized Loss, AFS
Less than 12 months, Unrealized Loss	$ (83)		$ (83)		$ (181)
U.S. Sponsored Mortgage backed securities
Description and number of positions
Number of investments in an unrealized loss position, AFS	13		13		19
Fair Value, AFS
Less than 12 months, Fair Value	$ 1,214		$ 1,214		$ 20,647
12 months or more, Fair Value	19,431		19,431		11,862
Unrealized Loss, AFS
Less than 12 months, Unrealized Loss	(1)		(1)		(233)
12 months or more, Unrealized Loss	$ (249)		$ (249)		$ (300)
Municipal notes
Description and number of positions
Number of investments in an unrealized loss position, AFS | position					22
Number of investments in an unrealized loss position, HTM | item	1		1
Fair Value, HTM
Less than 12 months, Fair Value	$ 426		$ 426		$ 3,827
12 months or more, Fair Value					5,559
Unrealized Loss, HTM
Less than 12 months, Unrealized Loss	$ (5)		$ (5)		(32)
12 months or more, Unrealized Loss					$ (56)
Equity and other securities
Description and number of positions
Number of investments in an unrealized loss position, HTM | position	0		0		(1)
Fair Value, AFS
Less than 12 months, Fair Value					$ 2,489
Unrealized Loss, AFS
Less than 12 months, Unrealized Loss					$ (11)