Condensed Consolidated Statements of Equity (Unaudited) (USD $) In Thousands	Common Shares	Additional Paid-in Capital	Treasury Shares	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling interest	Total
Beginning Balance at Dec. 31, 2010	$ 96	$ 177,875	$ (14,058)	$ (28,799)	$ 316,317	$ 13,128	$ 464,559
Net income					17,266	122	17,388
Other comprehensive income				281			281
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax of $419 (127 shares) and $531 (133 shares) for the year March 31, 2012 and 2011, respectively		(1,027)	1,940				913
Dividends declared ($0.15 and $0.11 per common share for the year March 31, 2012 and 2011, respectively)					(2,043)		(2,043)
Ending Balance at Mar. 31, 2011	96	176,848	(12,118)	(28,518)	331,540	13,250	481,098
Beginning Balance at Dec. 31, 2011	96	179,463	(14,997)	(43,090)	402,523	14,847	538,842
Net income					18,407	(679)	17,728
Other comprehensive income				465			465
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax of $419 (127 shares) and $531 (133 shares) for the year March 31, 2012 and 2011, respectively		320	2,297				2,617
Dividends declared ($0.15 and $0.11 per common share for the year March 31, 2012 and 2011, respectively)					(2,794)		(2,794)
Ending Balance at Mar. 31, 2012	$ 96	$ 179,783	$ (12,700)	$ (42,625)	$ 418,136	$ 14,168	$ 556,858