CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Treasury [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Non-controlling Interest Non Redeemable [Member]	Total Equity [Member]	Non-Controlling Interest - Redeemable [Member]	Net Income (Loss) [Member]
Balances at Dec. 31, 2010		$ 181	$ (4,453)	$ 91,017	$ 186,996	$ 1,747	$ 275,488	$ 13,535
Balances, shares at Dec. 31, 2010		21,180,286	3,008,264
Net income (loss)	(3,651)				(13,244)	1,075	(12,169)	8,518	(3,651)
Transfer of noncontrolling interest				205		163	368
Acquired noncontrolling interest						1,372	1,372
Noncontrolling interest distributions						(1,402)	(1,402)	(10,455)
Purchase of additional controlling interest				(641)			(641)	(250)
Sale of noncontrolling interest				212		96	308
Nonvested stock compensation				4,092			4,092
Issuance of vested stock		155,687
Treasury shares redeemed to pay income tax			(1,186)				(1,186)
Treasury shares redeemed to pay income tax, shares	43,182		43,182
Repurchase of common stock			(577)				(577)
Repurchase of common stock, shares	24,159		24,159
Excess tax benefits-vesting nonvested stock				221			221
Issuance of common stock under Employee Stock Purchase Plan		2		858			860
Issuance of common stock under Employee Stock Purchase Plan, shares	38,291	38,291
Balances at Dec. 31, 2011		183	(6,216)	95,964	173,752	3,051	266,734	11,348
Balances, shares at Dec. 31, 2011		21,374,264	3,075,605
Net income (loss)	35,428				27,440	595	28,035	7,393	35,428
Acquired noncontrolling interest						1,636	1,636
Noncontrolling interest distributions						(1,249)	(1,249)	(7,195)
Purchase of additional controlling interest				(189)			(189)	(120)
Sale of noncontrolling interest				80			80
Nonvested stock compensation				4,390			4,390
Issuance of vested stock		154,323
Treasury shares redeemed to pay income tax			(672)				(672)
Treasury shares redeemed to pay income tax, shares	36,621		36,621
Repurchase of common stock			(26,958)				(26,958)
Repurchase of common stock, shares	1,540,813		1,540,813
Excess tax benefits-vesting nonvested stock				(376)			(376)
Issuance of common stock under Employee Stock Purchase Plan		1		782			783
Issuance of common stock under Employee Stock Purchase Plan, shares	50,185	50,185
Reclassification of common stock at par value		32		(32)
Balances at Dec. 31, 2012	272,214	216	(33,846)	100,619	201,192	4,033	272,214	11,426
Balances, shares at Dec. 31, 2012		21,578,772	4,653,039
Net income (loss)	29,146				22,342	1,244	23,586	5,560	29,146
Transfer of noncontrolling interest						(1,342)	(1,342)	1,342
Acquired noncontrolling interest								608
Noncontrolling interest distributions						(1,060)	(1,060)	(7,066)
Purchase of additional controlling interest				(1,267)			(1,267)	(612)
Nonvested stock compensation				3,886			3,886
Issuance of vested stock		184,403
Treasury shares redeemed to pay income tax			(869)				(869)
Treasury shares redeemed to pay income tax, shares	40,608		40,608
Repurchase of common stock, shares	0
Excess tax benefits-vesting nonvested stock				(50)			(50)
Issuance of common stock under Employee Stock Purchase Plan		2		784			786
Issuance of common stock under Employee Stock Purchase Plan, shares	38,459	38,459
Balances at Dec. 31, 2013	$ 295,884	$ 218	$ (34,715)	$ 103,972	$ 223,534	$ 2,875	$ 295,884	$ 11,258
Balances, shares at Dec. 31, 2013		21,801,634	4,693,647