Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Unrealized gains on investment securities, before tax [Abstract]
Unrealized holding gains arising during period, before tax				$ 3,776	$ 2,011
Less adjustment for impaired investments, before tax				(181)
Less adjustment for impaired investments, tax		$ (12)		(62)
Less adjustment for impaired investments, net of tax (1)	[1]	(23)	$ 0	(119)	0
Less reclassification adjustment for gains realized in net income, before tax				1,382	652
Unrealized gains on investment securities, before tax				2,575	1,359
Unrecognized benefit obligation expense, before tax [Abstract]
Less reclassification adjustment for amortization, before tax				232	(51)
Unrecognized benefit obligation				(232)	(51)
Unrealized loss on derivative instrument, before tax				(475)	(708)
Other comprehensive income net, before tax				1,868	600
Unrealized gains on investment securities, tax [Abstract]
Unrealized holding gains arising during period, tax				1,434	691
Less reclassification adjustment for gains realized in net income, tax		95	28	470	222
Unrealized gains on investment securities, tax				1,026	469
Unrecognized benefit obligation expense, tax [Abstract]
Less reclassification adjustment for amortization, tax				0	0
Unrecognized benefit obligation, tax				0	0
Unrealized loss on derivative instrument, tax				(161)	(241)
Other comprehensive income net, tax				865	228
Unrealized gains on investment securities [Abstract]
Unrealized holding gains arising during period, net of tax		(877)	1,190	2,342	1,320
Less reclassification adjustment for gains realized in net income, net of tax	[2]	185	52	912	430
Unrealized gains (losses) on investment securities, net of tax		(1,039)	1,138	1,549	890
Unrecognized benefit obligation expense [Abstract]
Less reclassification adjustment for amortization, net of tax	[3]	(78)	(17)	(232)	(51)
Unrecognized benefit obligation expense		(78)	(17)	(232)	(51)
Unrealized loss on derivative instrument, net of tax		131	(282)	(314)	(467)
Other comprehensive income (loss)		(986)	$ 839	1,003	$ 372
Unrecognized benefit obligation		(3,909)		(3,909)		$ (3,677)
Unrealized gains (losses) on AFS investments		1,673		1,673		124
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax		(680)		(680)		(366)
Accumulated other comprehensive loss		$ (2,916)		$ (2,916)		$ (3,919)

[1] Gross amounts are included in total other-than-temporary impairment on AFS investment securities on the Consolidated Statements of Income in total non-interest income; amounts in the above table are net of $12 thousand and $62 thousand in taxes for the three and nine months ended September 30, 2016. See Note 15. Comprehensive Income.

[2] Gross amounts are included in net gains on the sale of AFS investment securities on the Consolidated Statements of Income in total non-interest income; amounts in the above table are net of $95 thousand and $470 thousand in taxes for the three and nine months ended September 30, 2016 and $28 thousand and $222 thousand for the three and nine months ended September 30, 2015. See Note 15. Comprehensive Income.

[3] Gross amounts are included in salaries and benefits on the Consolidated Statements of Income in non-interest expense.