Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
INCOME BEFORE PROVISION FOR INCOME TAXES		$ 9,155	$ 7,917	$ 17,685	$ 15,551
Provision for Income Taxes		2,850	2,393	5,525	4,707
Net Income	[1]	(99)	(72)	(153)	(129)
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]	16	(27)	106	(27)
INCOME BEFORE PROVISION FOR INCOME TAXES	[1]	16	(27)	106	(27)
Provision for Income Taxes	[1]	(6)	11	(41)	11
Net Income	[1]	10	(16)	65	(16)
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]	15	21	28	43
Amortization of Net Retirement Plan Actuarial Loss, Before-Tax Amount	[1],[2]	(194)	(114)	(387)	(230)
INCOME BEFORE PROVISION FOR INCOME TAXES	[1]	(179)	(93)	(359)	(187)
Provision for Income Taxes	[1]	70	37	141	74
Net Income	[1]	$ (109)	$ (56)	$ (218)	$ (113)

[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.