Consolidated Statement Of Total Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total Shareholders' Equity [Member]	Noncontrolling Interests [Member]	Total
Balance at Dec. 31, 2011	$ 456	$ 401,864	$ (83,890)	$ 1,090,891	$ 1,409,321	$ 39,543	$ 1,448,864
Balance, Shares at Dec. 31, 2011	45,726
Consolidated net loss				(36,732)	(36,732)	(941)	(37,673)
Other comprehensive earnings			1,899		1,899	3	1,902
Dividends declared				(18,420)	(18,420)		(18,420)
Issuances of common stock for stock award plans		1,731			1,731		1,731
Issuances of common stock for stock award plans, shares	16
Stock-based compensation expense		1,878			1,878		1,878
Balance at Mar. 31, 2012	$ 456	$ 405,473	$ (81,991)	$ 1,035,739	$ 1,359,677	$ 38,605	$ 1,398,282
Balance, Shares at Mar. 31, 2012	45,742