CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Amortization of terminated hedge, income tax effect	$ 120	$ 120	$ 120
Unrealized derivative losses on cash flow hedges, income tax effect	2,528	14,363	528
Minimum pension liability, income tax effect	$ 1,898	$ 4,691	$ 281