Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Balance December 31, 2012	$ 2,215
Other comprehensive income before reclassifications, Interest rate swaps	48	80
Reclassification adjustments for (gains) losses reclassified into income	0	(50)
Net current period other comprehensive (loss), Unrealized (gains) losses on securities	(1,285)	383
Net current period other comprehensive (loss), Pension and postretirement benefit plans	60	41
Balance March 31, 2013	1,038
Unrealized (Gains)/ Losses on Securities [Member]
Balance December 31, 2012	6,033
Other comprehensive income before reclassifications, Unrealized (gains) losses on securities	(1,285)
Reclassification adjustments for (gains) losses reclassified into income	0
Net current period other comprehensive (loss), Unrealized (gains) losses on securities	(1,285)
Balance March 31, 2013	4,748
Pension and Postretirement Benefit Plans [Member]
Balance December 31, 2012	(3,130)
Other comprehensive income before reclassifications, Pension and postretirement benefit plans	0
Reclassification adjustments for (gains) losses reclassified into income	60
Net current period other comprehensive (loss), Pension and postretirement benefit plans	60
Balance March 31, 2013	(3,070)
Interest Rate Swaps [Member]
Balance December 31, 2012	(688)
Other comprehensive income before reclassifications, Unrealized gains (losses) on securities deemed other than temporarily impaired	48
Reclassification adjustments for (gains) losses reclassified into income	0
Net current period other comprehensive (loss), Unrealized gains (losses) on securities deemed other than temporarily impaired	48
Balance March 31, 2013	(640)
Accumulated Other Comprehensive Income (Loss) [Member]
Balance December 31, 2012	2,215
Other comprehensive income before reclassifications, Accumulated other comprehensive income (loss)	(1,237)
Reclassification adjustments for (gains) losses reclassified into income	60
Net current period other comprehensive (loss), Accumulated other comprehensive income (loss)	(1,177)
Balance March 31, 2013	$ 1,038