Equity and Noncontrolling Interest Narrative (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stockholders Equity [Abstract]
Tax amount attributable to change in defined benefit plans	$ 247	$ 168	$ 527	$ 335
Tax amount attributable to change in fair value of derivatives	55	42	107	93
Shares, Issued		1,265,000		1,265,000
Proceeds from sale of common stock, net of related expenses		$ 48,143	$ 0	$ 48,143