Condensed Consolidated Statement of Equity (unaudited) (USD $) In Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Company Shares held by SERP [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2012	$ 4,560	$ 133,809	$ 502	$ (2,855)	$ 410,338	$ 1,644	$ 547,998
Balance (in shares) at Dec. 31, 2012	22,799
Net income	0	0	0	0	13,171	80	13,251
Other comprehensive income	0	0	(1,787)	0	0	(125)	(1,912)
Change in ownership percentage of subsidiaries	0	0	0	0	0	1,673	1,673
Stock-based compensation	0	435	0	0	0	0	435
Stock-based compensation (in shares)	1
Stock issued under incentive plans	10	(50)	0	0	0	0	(40)
Stock issued under incentive plans (in shares)	51
Withholding tax paid upon vesting of RSUs	0	(783)	0	0	0	0	(783)
SERP transactions, net	0	11	0	49	0	0	60
Balance at Mar. 31, 2013	$ 4,570	$ 133,422	$ (1,285)	$ (2,806)	$ 423,509	$ 3,272	$ 560,682
Balance (in shares) at Mar. 31, 2013	22,851