Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
INCOME BEFORE PROVISION FOR INCOME TAXES	$ 7,634		$ 7,420
Provision for Income Taxes	2,314		2,239
Net Income	5,320		5,181
Total Reclassifications out of Accumulated Other Comprehensive Income	(57)	[1]	82	[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	0	[1]	527	[1]
INCOME BEFORE PROVISION FOR INCOME TAXES	0	[1]	527	[1]
Provision for Income Taxes	0	[1]	(209)	[1]
Net Income	0	[1]	318	[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	22	[1],[2]	0	[1],[2]
Amortization of Net Retirement Plan Actuarial Loss, Before-Tax Amount	(116)	[1],[2]	(391)	[1],[2]
INCOME BEFORE PROVISION FOR INCOME TAXES	(94)	[1]	(391)	[1]
Provision for Income Taxes	37	[1]	155	[1]
Net Income	$ (57)	[1]	$ (236)	[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 (see pension footnote for additional details.).