Consolidated Statement of Changes in Retained Earnings and Accumulated Other Comprehensive Loss (Parenthetical) (Accumulated Other Comprehensive (Loss) Income, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive (Loss) Income
Pension and post-retirement plan adjustments, tax	$ 30,849	$ 11,364	$ 28,636