Investment Securities - Unrealized Losses (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) security	Dec. 31, 2014 USD ($) security
Investment securities
Less Than Twelve Months, Fair Value	$ 213,195	$ 62,277
Less Than Twelve Months, Unrealized Loss	(2,542)	(741)
Twelve Months or More, Fair Value	50,336	81,265
Twelve Months or More, Unrealized Loss	(1,395)	(1,797)
Total, Fair Value	263,531	143,542
Total, Unrealized Loss	$ (3,937)	$ (2,538)
Securities in an unrealized loss position
Securities in an unrealized loss position | security	104	57
Investment security holdings | Minimum
Securities in an unrealized loss position
Maturity period of available-for-sale securities	1 year
Investment security holdings | Maximum
Securities in an unrealized loss position
Maturity period of available-for-sale securities	40 years
Obligations of U.S. government agencies
Investment securities
Less Than Twelve Months, Fair Value	$ 34,533	$ 2,795
Less Than Twelve Months, Unrealized Loss	(429)	(17)
Twelve Months or More, Fair Value		2,607
Twelve Months or More, Unrealized Loss		(72)
Total, Fair Value	34,533	5,402
Total, Unrealized Loss	(429)	(89)
Mortgage-backed securities - U.S. government sponsored entities and agencies
Investment securities
Less Than Twelve Months, Fair Value	131,570	50,583
Less Than Twelve Months, Unrealized Loss	(1,485)	(670)
Twelve Months or More, Fair Value	31,558	58,753
Twelve Months or More, Unrealized Loss	(827)	(1,516)
Total, Fair Value	163,128	109,336
Total, Unrealized Loss	(2,312)	(2,186)
Mortgage-backed securities - Non-agency
Investment securities
Less Than Twelve Months, Fair Value	31,400	3,000
Less Than Twelve Months, Unrealized Loss	(317)	(7)
Twelve Months or More, Fair Value	2,917	507
Twelve Months or More, Unrealized Loss	(11)	(4)
Total, Fair Value	34,317	3,507
Total, Unrealized Loss	(328)	(11)
State and municipal securities
Investment securities
Less Than Twelve Months, Fair Value	15,660	5,899
Less Than Twelve Months, Unrealized Loss	(243)	(47)
Twelve Months or More, Fair Value	235	2,245
Twelve Months or More, Unrealized Loss	(1)	(14)
Total, Fair Value	15,895	8,144
Total, Unrealized Loss	(244)	(61)
Asset backed securities
Investment securities
Twelve Months or More, Fair Value	15,626	17,153
Twelve Months or More, Unrealized Loss	(556)	(191)
Total, Fair Value	15,626	17,153
Total, Unrealized Loss	(556)	$ (191)
Other investments
Investment securities
Less Than Twelve Months, Fair Value	32
Less Than Twelve Months, Unrealized Loss	(68)
Total, Fair Value	32
Total, Unrealized Loss	$ (68)