Securities (Details 4) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) security	Dec. 31, 2014 USD ($) security
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Held-to-maturity, securities in unrealized loss positions (securities) | security	31	47
Fair Value, Held to Maturity, Less than 12 Months	$ 36,382	$ 4,353
Fair Value, Held to Maturity, 12 Months or More	43,609	129,226
Fair Value, Held to Maturity, Total	79,991	133,579
Unrealized Losses, Held to Maturity, Less than 12 months	(467)	(30)
Unrealized Losses, Held to Maturity, 12 Months or More	(842)	(3,083)
Unrealized Losses, Held to Maturity, Total	$ (1,309)	$ (3,113)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	101	49
Fair Value, Available for Sale, Less than 12 Months	$ 206,395	$ 51,093
Fair Value, Available for Sale, 12 Months or More	103,154	152,374
Fair Value, Available for Sale, Total	309,549	203,467
Unrealized Losses, Available for Sale, Less than 12 months	(1,411)	(177)
Unrealized Losses, Available for Sale, 12 months or More	(8,134)	(10,289)
Unrealized Losses, Available for Sale, Total	$ (9,545)	$ (10,466)
Trust preferred securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	3	3
Fair Value, Available for Sale, Less than 12 Months	$ 0	$ 0
Fair Value, Available for Sale, 12 Months or More	19,469	18,503
Fair Value, Available for Sale, Total	19,469	18,503
Unrealized Losses, Available for Sale, Less than 12 months	0	0
Unrealized Losses, Available for Sale, 12 months or More	(5,301)	(6,781)
Unrealized Losses, Available for Sale, Total	$ (5,301)	$ (6,781)
Other debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	3	2
Fair Value, Available for Sale, Less than 12 Months	$ 1,316	$ 0
Fair Value, Available for Sale, 12 Months or More	3,866	4,175
Fair Value, Available for Sale, Total	5,182	4,175
Unrealized Losses, Available for Sale, Less than 12 months	(3)	0
Unrealized Losses, Available for Sale, 12 months or More	(31)	(74)
Unrealized Losses, Available for Sale, Total	$ (34)	$ (74)
Other equity securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	0	0
Fair Value, Available for Sale, Less than 12 Months	$ 0	$ 0
Fair Value, Available for Sale, 12 Months or More	0	0
Fair Value, Available for Sale, Total	0	0
Unrealized Losses, Available for Sale, Less than 12 months	0	0
Unrealized Losses, Available for Sale, 12 months or More	0	0
Unrealized Losses, Available for Sale, Total	$ 0	$ 0
Obligations of other U.S. Government agencies and corporations
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Held-to-maturity, securities in unrealized loss positions (securities) | security	18	28
Fair Value, Held to Maturity, Less than 12 Months	$ 31,567	$ 1,000
Fair Value, Held to Maturity, 12 Months or More	38,688	119,174
Fair Value, Held to Maturity, Total	70,255	120,174
Unrealized Losses, Held to Maturity, Less than 12 months	(414)	(1)
Unrealized Losses, Held to Maturity, 12 Months or More	(800)	(2,914)
Unrealized Losses, Held to Maturity, Total	$ (1,214)	$ (2,915)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	1	1
Fair Value, Available for Sale, Less than 12 Months	$ 3,981	$ 0
Fair Value, Available for Sale, 12 Months or More	0	3,881
Fair Value, Available for Sale, Total	3,981	3,881
Unrealized Losses, Available for Sale, Less than 12 months	(19)	0
Unrealized Losses, Available for Sale, 12 months or More	0	(119)
Unrealized Losses, Available for Sale, Total	$ (19)	$ (119)
Obligations of states and political subdivisions
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Held-to-maturity, securities in unrealized loss positions (securities) | security	13	19
Fair Value, Held to Maturity, Less than 12 Months	$ 4,815	$ 3,353
Fair Value, Held to Maturity, 12 Months or More	4,921	10,052
Fair Value, Held to Maturity, Total	9,736	13,405
Unrealized Losses, Held to Maturity, Less than 12 months	(53)	(29)
Unrealized Losses, Held to Maturity, 12 Months or More	(42)	(169)
Unrealized Losses, Held to Maturity, Total	$ (95)	$ (198)
Government agency mortgage backed securities | Residential mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	43	16
Fair Value, Available for Sale, Less than 12 Months	$ 130,306	$ 18,924
Fair Value, Available for Sale, 12 Months or More	27,431	49,612
Fair Value, Available for Sale, Total	157,737	68,536
Unrealized Losses, Available for Sale, Less than 12 months	(937)	(39)
Unrealized Losses, Available for Sale, 12 months or More	(841)	(793)
Unrealized Losses, Available for Sale, Total	$ (1,778)	$ (832)
Government agency mortgage backed securities | Commercial mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	9	3
Fair Value, Available for Sale, Less than 12 Months	$ 16,782	$ 0
Fair Value, Available for Sale, 12 Months or More	814	10,651
Fair Value, Available for Sale, Total	17,596	10,651
Unrealized Losses, Available for Sale, Less than 12 months	(104)	0
Unrealized Losses, Available for Sale, 12 months or More	(3)	(137)
Unrealized Losses, Available for Sale, Total	$ (107)	$ (137)
Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	41	24
Fair Value, Available for Sale, Less than 12 Months	$ 52,128	$ 32,169
Fair Value, Available for Sale, 12 Months or More	51,574	65,552
Fair Value, Available for Sale, Total	103,702	97,721
Unrealized Losses, Available for Sale, Less than 12 months	(347)	(138)
Unrealized Losses, Available for Sale, 12 months or More	(1,958)	(2,385)
Unrealized Losses, Available for Sale, Total	$ (2,305)	$ (2,523)
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	1	0
Fair Value, Available for Sale, Less than 12 Months	$ 1,882	$ 0
Fair Value, Available for Sale, 12 Months or More	0	0
Fair Value, Available for Sale, Total	1,882	0
Unrealized Losses, Available for Sale, Less than 12 months	(1)	0
Unrealized Losses, Available for Sale, 12 months or More	0	0
Unrealized Losses, Available for Sale, Total	$ (1)	$ 0
Less than 12 Months
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Held-to-maturity, securities in unrealized loss positions (securities) | security	16	5
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	70	9
Less than 12 Months | Trust preferred securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	0	0
Less than 12 Months | Other debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	1	0
Less than 12 Months | Other equity securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	0	0
Less than 12 Months | Obligations of other U.S. Government agencies and corporations
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Held-to-maturity, securities in unrealized loss positions (securities) | security	10	2
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	1	0
Less than 12 Months | Obligations of states and political subdivisions
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Held-to-maturity, securities in unrealized loss positions (securities) | security	6	3
Less than 12 Months | Government agency mortgage backed securities | Residential mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	34	3
Less than 12 Months | Government agency mortgage backed securities | Commercial mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	8	0
Less than 12 Months | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	25	6
Less than 12 Months | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	1	0
12 Months or More
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Held-to-maturity, securities in unrealized loss positions (securities) | security	15	42
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	31	40
12 Months or More | Trust preferred securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	3	3
12 Months or More | Other debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	2	2
12 Months or More | Other equity securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	0	0
12 Months or More | Obligations of other U.S. Government agencies and corporations
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Held-to-maturity, securities in unrealized loss positions (securities) | security	8	26
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	0	1
12 Months or More | Obligations of states and political subdivisions
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Held-to-maturity, securities in unrealized loss positions (securities) | security	7	16
12 Months or More | Government agency mortgage backed securities | Residential mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	9	13
12 Months or More | Government agency mortgage backed securities | Commercial mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	1	3
12 Months or More | Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	16	18
12 Months or More | Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Available-for-sale, securities in unrealized loss positions (securities) | security	0	0