Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pre-Tax
Unrealized holding gains on securities	$ 4,509	$ 236
Non-credit related portion of other-than-temporary impairment on securities	0	0
Reclassification adjustment for gains realized in net income	0	115
Amortization of unrealized holding gains on securities transferred to the held to maturity category	(71)	(106)
Total securities available for sale	4,438	245
Tax Expense (Benefit)
Unrealized holding gains on securities	1,725	90
Non-credit related portion of other-than-temporary impairment on securities	0	0
Reclassification adjustment for gains realized in net income	0	44
Amortization of unrealized holding gains on securities transferred to the held to maturity category	(27)	(40)
Total securities available for sale	1,698	94
Net of Tax
Unrealized holding gains on securities	2,784	146
Non-credit related portion of other-than-temporary impairment on securities	0	0
Reclassification adjustment for gains realized in net income	0	71
Amortization of unrealized holding gains on securities transferred to the held to maturity category	(44)	(66)
Total securities	2,740	151
Pre-Tax
Unrealized holding losses on derivative instruments	(679)	335
Reclassification adjustment for gains realized in net income	0	(85)
Total derivative instruments	(679)	250
Tax Expense (Benefit)
Unrealized holding losses on derivative instruments	(260)	128
Reclassification adjustment for gains realized in net income	0	(32)
Total derivative instruments	(260)	96
Net of Tax
Unrealized holding losses on derivative instruments	(419)	207
Reclassification adjustment for gains realized in net income	0	(53)
Totals derivative instruments	(419)	154
Defined benefit pension and post-retirement benefit plans, Pre-Tax [Abstract]
Net gain (loss) arising during the period	0	0
Amortization of net actuarial loss recognized in net periodic pension cost	73	116
Total defined benefit pension and post-retirement benefit plans	73	116
Defined benefit pension and post-retirement benefit plans, Tax Expense (Benefit) [Abstract]
Net gain (loss) arising during the period	0	0
Amortization of net actuarial loss recognized in net periodic pension cost	28	44
Total defined benefit pension and post-retirement benefit plans	28	44
Defined benefit pension and post-retirement benefit plans, Net of Tax [Abstract]
Net gain (loss) arising during the period	0	0
Amortization of net actuarial loss recognized in net periodic pension cost	45	72
Total defined benefit pension and post-retirement benefit plans	45	72
Total other comprehensive income, Pre-Tax	3,832	611
Total other comprehensive income, Tax Expense (Benefit)	1,466	234
Other comprehensive income, net of tax	$ 2,366	$ 377