CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCES at Dec. 31, 2009	$ 90,213	$ 1	$ 15	$ 129	$ 58,037	$ 32,057	$ 0	$ (26)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid	(90)	0	0	0	0	(90)	0	0
Compensation expense for restricted stock	973	0	0	0	973	0	0	0
Net gain on interest rate (long-term Investment) swap for comprehensive income	26	0	0	0	0	0	0	26
Issuance of shares in connection with acquisitions	7,066	0	0	5	7,061	0	0	0
Issuance of shares upon conversion of notes to common stock	6,211	0	0	5	6,206	0	0	0
Exercise of stock options and vesting of restricted stock	340	0	0	1	339	0	0	0
Net income (loss)	19,381	0	0	0	0	19,381	0	0
BALANCES at Dec. 31, 2010	124,120	1	15	140	72,616	51,348	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid	(90)	0	0	0	0	(90)	0	0
Compensation expense for restricted stock	1,256	0	0	0	1,256	0	0	0
Net gain on interest rate (long-term Investment) swap for comprehensive income	64	0	0	0	0	0	0	64
Issuance of shares in connection with acquisitions	1,143	0	0	0	1,143	0	0	0
Acquisition of treasury stock	(1,445)	0	0	0	0	0	(1,445)	0
Vesting of restricted stock	190	0	0	1	189	0	0	0
Net income (loss)	31,437	0	0	0	0	31,437	0	0
BALANCES at Dec. 31, 2011	156,675	1	15	141	75,204	82,695	(1,445)	64
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid	(90)	0	0	0	0	(90)	0	0
Compensation expense for restricted stock	1,955	0	0	0	1,955	0	0	0
Net gain on interest rate (long-term Investment) swap for comprehensive income	378	0	0	0	0	0	0	378
Issuance of shares in connection with acquisitions	946	0	0	0	946	0	0	0
Acquisition of treasury stock	(3,422)	0	0	0	0	0	(3,422)	0
Vesting of restricted stock	449	0	0	0	449	0	0	0
Cumulative translation adjustment	617	0	0	0	0	0	0	617
Net income (loss)	50,985	0	0	0	0	50,985	0	0
BALANCES at Dec. 31, 2012	$ 208,493	$ 1	$ 15	$ 141	$ 78,554	$ 133,590	$ (4,867)	$ 1,059