CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands	Total		Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Noncontrolling Interest Non Redeemable
Beginning balance, Amount at Dec. 31, 2014	$ 321,595		$ 220	$ (35,660)	$ 108,708	$ 245,371	$ 2,956
Beginning balance, Shares at Dec. 31, 2014			22,015,211
Beginning balance, Treasury Shares at Dec. 31, 2014	(4,734,363)			(4,734,363)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 25,950	[1]				24,600	1,350
Noncontrolling interest	155						155
Purchase of noncontrolling interest	(275)				(275)
Noncontrolling interest distributions	$ (1,179)						(1,179)
Stock options exercised, Shares	9,500		9,500
Stock options exercised	$ 145				145
Nonvested stock compensation	3,150				3,150
Issuance of vested stock			179,321
Treasury shares redeemed to pay income tax	$ (1,449)			$ (1,449)
Treasury shares redeemed to pay income tax, Shares	(41,550)			(41,550)
Excess tax benefits — vesting nonvested stock	$ 897				897
Issuance of common stock under Employee Stock Purchase Plan	569		$ 2		567
Issuance of common stock under Employee Stock Purchase Plan, Shares			17,723
Ending balance, Amount at Sep. 30, 2015	$ 349,558		$ 222	$ (37,109)	$ 113,192	$ 269,971	$ 3,282
Ending balance, Shares at Sep. 30, 2015			22,221,755
Ending balance, Treasury Shares at Sep. 30, 2015	(4,775,913)			(4,775,913)

[1] Net income excludes net income attributable to noncontrolling interest-redeemable of $5.6 million during the nine months ended September 30, 2015. Noncontrolling interest-redeemable is reflected outside of permanent equity on the condensed consolidated balance sheets. See Note 9 of the Notes to Condensed Consolidated Financial Statements.