Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Gains/(losses) on cash flow hedges
Interest rate derivative contracts	$ 268
Interest rate derivative contracts, Total before tax	268	220
Income tax effect	(91)	(75)
Interest rate derivative contracts, Net of tax	177
Available-for-sale securities
Realized gain on sale of securities	268
Impairment expense
Available-for-sale securities, Total before tax	268
Income tax expense	(91)	(91)
Available-for-sale securities, Net of tax	177
Defined benefit pension plan items
Amortization of prior service costs	(37)	(52)
Amortization of actuarial gains/(losses)	10
Pension curtailment
Defined benefit pension plan items, Total before tax	36
Defined benefit pension plan items, Income tax expense	(12)
Defined benefit pension plan items, Net of tax	24
Total reclassifications	$ 378