Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
INCOME BEFORE PROVISION FOR INCOME TAXES	$ 8,530		$ 7,634
Provision for Income Taxes	2,675		2,314
Net Income	(165)	[1]	(57)	[1]
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	(90)	[1]	0	[1]
INCOME BEFORE PROVISION FOR INCOME TAXES	(90)	[1]	0	[1]
Provision for Income Taxes	35	[1]	0	[1]
Net Income	(55)	[1]	0	[1]
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	13	[1],[2]	22	[1],[2]
Amortization of Net Retirement Plan Actuarial Loss, Before-Tax Amount	(192)	[1],[2]	(116)	[1],[2]
INCOME BEFORE PROVISION FOR INCOME TAXES	(179)	[1]	(94)	[1]
Provision for Income Taxes	69	[1]	37	[1]
Net Income	$ (110)	[1]	$ (57)	[1]

[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.