Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
INCOME BEFORE PROVISION FOR INCOME TAXES		$ 8,328	$ 8,742	$ 26,013	$ 24,293
Provision for Income Taxes		2,395	2,595	7,920	7,302
Net Income	[1]	(109)	25	(263)	(104)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Available for Sale Securities [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Reclassification Adjustment for Securities Gains Included in Net Income, Before-Tax Amount	[1]	0	137	106	110
INCOME BEFORE PROVISION FOR INCOME TAXES	[1]	0	137	106	110
Provision for Income Taxes	[1]	0	(55)	(42)	(44)
Net Income	[1]	0	82	64	66
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amortization of Defined Benefit Pension Items, Prior-Service Costs, Before Tax	[1],[2]	13	22	41	65
Amortization of Net Retirement Plan Actuarial Loss, Before-Tax Amount	[1],[2]	(192)	(116)	(579)	(346)
INCOME BEFORE PROVISION FOR INCOME TAXES	[1]	(179)	(94)	(538)	(281)
Provision for Income Taxes	[1]	70	37	211	111
Net Income	[1]	$ (109)	$ (57)	$ (327)	$ (170)

[1] Amounts in parentheses indicate debits to profit/loss.

[2] These accumulated other comprehensive income components are included in the computation of net periodic pension cost.