Condensed Consolidated Statements of Comprehensive Income Parenthetical (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Unrealized gain from interest rate swap (net of tax)	$ 0	$ 142	$ 0	$ 389
Pension and postretirement benefits liability adjustment (net of tax)	$ 2,142	$ 1,488	$ 6,428	$ 4,463