Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Pre-Tax Amount
Change in net unrealized gains/(losses) on securities available-for-sale		$ (1,921)	$ 5,177	$ 11,748	$ 4,288
Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income	[1]	0	0	0	34
Adjustment to funded status of employee benefit plans		544	647	4,889	1,839
Other Comprehensive Income/(Loss)		(1,377)	5,824	16,637	6,161
Tax (Expense) Benefit
Change in net unrealized gains/(losses) on securities available-for-sale		672	(1,812)	(4,112)	(1,501)
Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income	[1]	0	0	0	(12)
Adjustment to funded status of employee benefit plans		(190)	(227)	(1,711)	(551)
Other Comprehensive (Loss)/Income		482	(2,039)	(5,823)	(2,064)
Net of Tax Amount
Change in net unrealized gains/(losses) on securities available-for-sale		(1,249)	3,365	7,636	2,787
Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income	[1]	0	0	0	22
Adjustment to funded status of employee benefit plans		354	420	3,178	1,288
Other Comprehensive Income/(Loss)		$ (895)	$ 3,785	$ 10,814	$ 4,097

[1] Reclassification adjustments are comprised of realized security gains or losses. The realized gains or losses have been reclassified out of accumulated other comprehensive income and have affected certain lines in the consolidated statement of comprehensive income as follows; the pre-tax amount is included in securities gains/losses-net, the tax expense amount is included in the provision for income taxes and the net of tax amount is included in net income.