CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) - 9 months ended Sep. 30, 2016 - USD ($) $ in Thousands	Total		Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Noncontrolling Interest Non Redeemable
Beginning balance, Amount at Dec. 31, 2015	$ 357,793		$ 222	$ (37,139)	$ 113,793	$ 277,706	$ 3,211
Beginning balance, Shares at Dec. 31, 2015			22,224,423
Beginning balance, Treasury Shares at Dec. 31, 2015	(4,776,560)			(4,776,560)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Acquired noncontrolling interest	$ 970						970
Noncontrolling Interest Distributions	$ (1,127)						(1,127)
Stock options exercised, Shares	5,500		5,500
Stock options exercised	$ 109				109
Sale of noncontrolling interest	165				(374)		539
Net income	27,817	[1]				26,766	1,051
Noncontrolling Interest, Other Increase (Decrease)	136						136
Nonvested stock compensation	3,518				3,518
Issuance of vested stock			$ 2		(2)
Issuance of vested stock, Shares			172,586
Treasury shares redeemed to pay income tax	$ (1,931)			$ (1,931)
Treasury shares redeemed to pay income tax, Shares	(50,312)			(50,312)
Excess tax benefits — vesting nonvested stock	$ 982				982
Issuance of common stock under Employee Stock Purchase Plan	663				663
Issuance of common stock under Employee Stock Purchase Plan, Shares			17,014
Ending balance, Amount at Sep. 30, 2016	$ 389,095		$ 224	$ (39,070)	$ 118,689	$ 304,472	$ 4,780
Ending balance, Shares at Sep. 30, 2016			22,419,523
Ending balance, Treasury Shares at Sep. 30, 2016	(4,826,872)			(4,826,872)

[1] Net income excludes net income attributable to noncontrolling interest-redeemable of $6.0 million during the nine months ending September 30, 2016. 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.