CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Statement Of Income And Comprehensive Income Abstract
Net income (loss)	$ 5,349	$ 19,360
Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax	775	0
Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax	531	0
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax	403	52
Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease	186	148
Total Comprehensive Income (Loss)	833	200
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest	$ 6,182	$ 19,560