Condensed Consolidated Statement of Changes in Equity (Unaudited) (USD $) In Thousands, except Share data	Total		Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Non-controlling Interest Non Redeemable
Beginning balances at Dec. 31, 2011	$ 266,734		$ 183	$ (6,216)	$ 95,964	$ 173,752	$ 3,051
Beginning balances, shares at Dec. 31, 2011			21,374,264	(3,075,605)
Net income	20,342	[1]				20,040	302
Reclassification of common stock at par value			32		(32)
Sale of noncontrolling interest	80				80
Purchase of additional controlling interest	(38)				(38)
Acquired noncontrolling interest	1,636						1,636
Noncontrolling interest distributions	(942)						(942)
Stock-based compensation expense	3,398				3,398
Issuance of vested stock			140,817
Treasury shares redeemed to pay income tax, value	(602)			(602)
Treasury shares redeemed to pay income tax, shares				(32,756)
Repurchase of common stock, value	(19,017)			(19,017)
Repurchase of common stock, shares	(1,093,659)			(1,093,659)
Excess tax benefits - vesting nonvested stock	(343)				(343)
Issuance of common stock under Employee Stock Purchase Plan, shares			39,090
Issuance of common stock under Employee Stock Purchase Plan, value	587		1		586
Ending balances at Sep. 30, 2012	$ 271,835		$ 216	$ (25,835)	$ 99,615	$ 193,792	$ 4,047
Ending balances, shares at Sep. 30, 2012			21,554,171	(4,202,020)

[1] Net income excludes net income attributable to noncontrolling interest-redeemable of $5.2 million during the nine months ending September 30, 2012. Noncontrolling interest-redeemable is reflected outside of permanent equity on the consolidated balance sheets. See Note 9 of the Notes to Condensed Consolidated Financial Statements.