CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Statement of Comprehensive Income
Net income	$ 7,699	$ 18,723	$ 13,268	$ 38,987
Translation adjustment	(3,594)	1,507	404	6,231
Unrealized gain (loss) on defined benefit plan, net of tax	(938)	(2,183)	(3,963)	5,129
Comprehensive income	3,167	18,047	9,709	50,347
Less: Comprehensive income attributable to noncontrolling interest	(1,046)	(742)	(1,744)	(1,322)
Total comprehensive income attributable to common stockholders	$ 2,121	$ 17,305	$ 7,965	$ 49,025