Equity and Noncontrolling Interest - Narrative (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Stockholders Equity [Abstract]
Tax amount attributable to change in defined benefit plans	$ 311	$ 143		$ 838	$ 478
Tax amount attributable to change in fair value of derivatives	39	61		146	154
Shares, Issued			1,265,000
Proceeds from sale of common stock, net of related expenses			$ 48,143	$ 0	$ 48,143