Securities - Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) security	Dec. 31, 2014 USD ($) security	Dec. 31, 2013
Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Amortized Cost, Less than 12 Months	$ 169,166	$ 60,966
Gross Unrealized Losses, Less than 12 Months	(584)	(138)
Fair Value, Less than 12 Months	168,582	60,828
Amortized Cost, More than 12 Months		16,999
Gross Unrealized Losses, More than 12 Months		(345)
Fair Value, More than 12 Months		16,654
Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Amortized Cost, Less than 12 Months	13,165	12,414
Gross Unrealized Losses, Less than 12 Months	(121)	(92)
Fair Value, Less than 12 Months	13,044	12,322
Amortized Cost, More than 12 Months	15,442	18,552
Gross Unrealized Losses, More than 12 Months	(387)	(468)
Fair Value, More than 12 Months	$ 15,055	$ 18,084
Investment Securities Continuous Unrealized Loss Position Qualitative Disclosure Abstract
AFS and HTM, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	6	12
Securities in Unrealized Loss Position, Continuour Unrealized Loss as percent of Amortized Cost		10	10
US Treasury and Government [Member]
Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Amortized Cost, Less than 12 Months	$ 85,028	$ 37,049
Gross Unrealized Losses, Less than 12 Months	(85)	(85)
Fair Value, Less than 12 Months	84,943	36,964
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Amortized Cost, Less than 12 Months	48,830	20,403
Gross Unrealized Losses, Less than 12 Months	(184)	(53)
Fair Value, Less than 12 Months	48,646	20,350
Amortized Cost, More than 12 Months		4,440
Gross Unrealized Losses, More than 12 Months		(56)
Fair Value, More than 12 Months		4,384
Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Amortized Cost, Less than 12 Months	3,220
Gross Unrealized Losses, Less than 12 Months	(48)
Fair Value, Less than 12 Months	3,172
Amortized Cost, More than 12 Months	2,571	4,564
Gross Unrealized Losses, More than 12 Months	(95)	(122)
Fair Value, More than 12 Months	2,476	4,442
Collateralized Mortgage Backed Securities [Member]
Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Amortized Cost, Less than 12 Months	33,299	3,514
Gross Unrealized Losses, Less than 12 Months	(314)
Fair Value, Less than 12 Months	32,985	3,514
Amortized Cost, More than 12 Months		12,559
Gross Unrealized Losses, More than 12 Months		(289)
Fair Value, More than 12 Months		12,270
Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Amortized Cost, Less than 12 Months	9,945	12,414
Gross Unrealized Losses, Less than 12 Months	(73)	(92)
Fair Value, Less than 12 Months	9,872	12,322
Amortized Cost, More than 12 Months	12,871	13,988
Gross Unrealized Losses, More than 12 Months	(292)	(346)
Fair Value, More than 12 Months	12,579	$ 13,642
Corporate debt securities
Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Amortized Cost, Less than 12 Months	2,009
Gross Unrealized Losses, Less than 12 Months	(1)
Fair Value, Less than 12 Months	$ 2,008