Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated other comprehensive income (loss), beginning balance			$ (19,757)	$ (9,699)
Other comprehensive income (loss) before reclassifications			1,680	1,652
Amounts reclassed from accumulated other comprehensive income (loss)			408	331
Total other comprehensive income (loss), net of tax	$ 1,376	$ 1,519	2,088	1,983
Accumulated other comprehensive income (loss), ending balance	(17,669)	(7,716)	(17,669)	(7,716)
Net Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance			(6,825)	1,051
Other comprehensive income (loss) before reclassifications			2,229	1,742
Amounts reclassed from accumulated other comprehensive income (loss)			0	0
Total other comprehensive income (loss), net of tax			2,229	1,742
Accumulated other comprehensive income (loss), ending balance	(4,596)	2,793	(4,596)	2,793
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance			(300)	(43)
Other comprehensive income (loss) before reclassifications			(549)	(90)
Amounts reclassed from accumulated other comprehensive income (loss)			199	0
Total other comprehensive income (loss), net of tax			(350)	(90)
Accumulated other comprehensive income (loss), ending balance	(650)	(133)	(650)	(133)
Pension Benefit Adjustment [Member]
Accumulated other comprehensive income (loss), beginning balance			(12,632)	(10,707)
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassed from accumulated other comprehensive income (loss)			209	331
Total other comprehensive income (loss), net of tax			209	331
Accumulated other comprehensive income (loss), ending balance	$ (12,423)	$ (10,376)	$ (12,423)	$ (10,376)