Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
TOTAL Balance	$ (4,320)	$ (19,146)	$ (13,969)	$ (7,472)	$ (4,320)
Change in Other comprehensive income before reclassification	1,879	(2,322)	11,297	(14,544)
Amounts reclassified from accumulated other comprehensive income	116	340	347	888
Net Current period other comprehensive other income	1,995	(1,982)	11,644	(13,656)
TOTAL Balance	(2,325)	(21,128)	(2,325)	(21,128)	(4,320)
Retirement plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,Retirement plans		(20,351)	(10,334)	(20,903)	(10,104)
Change in Other comprehensive income before reclassification, Retirement plans	0	0	0	0
Amounts reclassified from accumulated other comprehensive income, Retirement plans	116	340	346	892
Net Current period other comprehensive other income, Retirement plans	116	340	346	892
Ending balance, Retirement plans	(9,988)	(20,011)	(9,988)	(20,011)	(10,104)
Unrealized gains and Losses on available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, Unrealized gains and Losses on available-for-sale Securities		1,205	(3,635)	13,431	5,784
Change in Other comprehensive income before reclassification, Unrealized gains and Losses on available-for-sale Securities	1,879	(2,322)	11,297	(14,544)
Amount reclassified from accumalted other comperhensive income, unrealized gain and losses and available for sale securities	0	0	1	(4)
Net Current period other comprehensive other income, Unrealized gains and Losses on available-for-sale Securities	1,879	(2,322)	11,298	(14,548)
Ending balance, Unrealized gains and Losses on available-for-sale Securities	$ 7,663	$ (1,117)	$ 7,663	$ (1,117)	$ 5,784