CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other Comprehensive Income, net of tax
Qualified Cash Flow Hedging Instrument Expense, net of tax (benefit) expense of	$ (1)	$ (1)	$ 48
Adjustment to Pension and Post-Retirement Benefits Plans, net of tax (benefit) expense of	(231)	12	(49)
Unrealized Investment loss, net of tax expense (benefit) of	$ 31	$ 30	$ (158)