Securities Investments in continuous unrealized loss position (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Held to Maturity, Fair Value, Less than Twelve Months	$ 3,389	$ 1,397
Held to Maturity, Gross Unrealized Losses, Less than Twelve Months	(68)	(103)
Held to Maturity, Fair Value, Twelve Months or Greater	0	0
Held to Maturity, Gross Unrealized Losses, Twelve Months or Greater	0	0
Held to Maturity, Fair Value	3,389	1,397
Held to Maturity, Gross Unrealized Losses, Total	(68)	(103)
Available for Sale, Fair Value, Less than Twelve Months	134,167	77,450
Available for Sale, Gross Unrealized Losses, Less than Twelve Months	(1,721)	(1,009)
Available for Sale, Fair Value, Twelve Months or Greater	32,790	26,915
Available for Sale, Gross Unrealized Losses, Twelve Months or Greater	(1,239)	(1,029)
Available for Sale, Fair Value, Total	166,957	104,365
Available for Sale, Gross Unrealized Losses, Total	(2,960)	(2,038)
U.S. government agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Fair Value, Less than Twelve Months	46,000	15,331
Available for Sale, Gross Unrealized Losses, Less than Twelve Months	(304)	(65)
Available for Sale, Fair Value, Twelve Months or Greater	4,223	5,833
Available for Sale, Gross Unrealized Losses, Twelve Months or Greater	(76)	(138)
Available for Sale, Fair Value, Total	50,223	21,164
Available for Sale, Gross Unrealized Losses, Total	(380)	(203)
Obligations of states and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Held to Maturity, Fair Value, Less than Twelve Months	1,419	1,397
Held to Maturity, Gross Unrealized Losses, Less than Twelve Months	(38)	(103)
Held to Maturity, Fair Value, Twelve Months or Greater	0	0
Held to Maturity, Gross Unrealized Losses, Twelve Months or Greater	0	0
Held to Maturity, Fair Value	1,419	1,397
Held to Maturity, Gross Unrealized Losses, Total	(38)	(103)
Available for Sale, Fair Value, Less than Twelve Months	16,559	2,780
Available for Sale, Gross Unrealized Losses, Less than Twelve Months	(324)	(14)
Available for Sale, Fair Value, Twelve Months or Greater	1,082	3,456
Available for Sale, Gross Unrealized Losses, Twelve Months or Greater	(110)	(195)
Available for Sale, Fair Value, Total	17,641	6,236
Available for Sale, Gross Unrealized Losses, Total	(434)	(209)
Mortgage-backed securities, Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Fair Value, Less than Twelve Months	27,627	28,065
Available for Sale, Gross Unrealized Losses, Less than Twelve Months	(402)	(327)
Available for Sale, Fair Value, Twelve Months or Greater	9,911	11,027
Available for Sale, Gross Unrealized Losses, Twelve Months or Greater	(343)	(415)
Available for Sale, Fair Value, Total	37,538	39,092
Available for Sale, Gross Unrealized Losses, Total	(745)	(742)
Mortgage-backed securities, Non-agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Fair Value, Less than Twelve Months	7,842	15,488
Available for Sale, Gross Unrealized Losses, Less than Twelve Months	(37)	(167)
Available for Sale, Fair Value, Twelve Months or Greater	671	4,730
Available for Sale, Gross Unrealized Losses, Twelve Months or Greater	(1)	(60)
Available for Sale, Fair Value, Total	8,513	20,218
Available for Sale, Gross Unrealized Losses, Total	(38)	(227)
Other Asset Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Fair Value, Less than Twelve Months	25,399	6,594
Available for Sale, Gross Unrealized Losses, Less than Twelve Months	(276)	(45)
Available for Sale, Fair Value, Twelve Months or Greater	12,037	1,077
Available for Sale, Gross Unrealized Losses, Twelve Months or Greater	(327)	(13)
Available for Sale, Fair Value, Total	37,436	7,671
Available for Sale, Gross Unrealized Losses, Total	(603)	(58)
Corporate preferred stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale, Fair Value, Less than Twelve Months		0
Available for Sale, Gross Unrealized Losses, Less than Twelve Months		0
Available for Sale, Fair Value, Twelve Months or Greater		0
Available for Sale, Gross Unrealized Losses, Twelve Months or Greater		0
Available for Sale, Fair Value, Total		0
Available for Sale, Gross Unrealized Losses, Total		0
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Held to Maturity, Fair Value, Less than Twelve Months	1,970
Held to Maturity, Gross Unrealized Losses, Less than Twelve Months	(30)
Held to Maturity, Fair Value, Twelve Months or Greater	0
Held to Maturity, Gross Unrealized Losses, Twelve Months or Greater	0
Held to Maturity, Fair Value	1,970
Held to Maturity, Gross Unrealized Losses, Total	(30)
Available for Sale, Fair Value, Less than Twelve Months	10,740	9,192
Available for Sale, Gross Unrealized Losses, Less than Twelve Months	(378)	(391)
Available for Sale, Fair Value, Twelve Months or Greater	4,866	792
Available for Sale, Gross Unrealized Losses, Twelve Months or Greater	(382)	(208)
Available for Sale, Fair Value, Total	15,606	9,984
Available for Sale, Gross Unrealized Losses, Total	$ (760)	$ (599)

Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss1

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