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	$ 133,810	$ 508	$ (2,855)	$ 413,074	$ 1,644	$ 550,741
Balance (in shares) at Dec. 31, 2012	22,799
Net income	0	0	0	0	30,776	154	30,930
Other comprehensive income	0	0	(5,366)	0	0	(451)	(5,817)
Dividends declared	0	4	0	0	(4,574)	0	(4,570)
Change in ownership percentage of subsidiaries	0	0	0	0	0	2,069	2,069
Stock-based compensation	1	1,011	0	0	0	0	1,012
Stock-based compensation (in shares)	4
Stock issued under incentive plans	10	(9)	0	0	0	0	1
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	63	0	(61)	0	0	2
Balance at Sep. 30, 2013	$ 4,571	$ 134,096	$ (4,858)	$ (2,916)	$ 439,276	$ 3,416	$ 573,585
Balance (in shares) at Sep. 30, 2013	22,854