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]	Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
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 (loss) on sale of long-term investment for comprehensive income	378	0	0	0	0	0	0	378
Issuance of shares in connection with an acquisitions	946	0	0	0	946	0	0	0
Vesting of restricted stock	449	0	0	0	449	0	0	0
Acquisition of treasury stock	(3,422)	0	0	0	0	0	(3,422)	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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid	(90)	0	0	0	0	(90)	0	0
Issuance of common stock	24,358			2	24,356
Compensation expense for restricted stock	2,832	0	0	0	2,832	0	0	0
Net gain (loss) on sale of long-term investment for comprehensive income	(387)	0	0	0	0	0	0	(387)
Issuance of shares in connection with an acquisitions	3,518	0	0	1	3,517	0	0	0
Vesting of restricted stock	633	0	0	0	633	0	0	0
Acquisition of treasury stock	(304)	0	0	0	0	0	(304)	0
Cumulative translation adjustment	(3,040)	0	0	0	0	0	0	(3,040)
Net income (loss)	60,237	0	0	0	0	60,237	0	0
BALANCES at Dec. 31, 2013	296,250	1	15	144	109,892	193,737	(5,171)	(2,368)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid	(90)	0	0	0	0	(90)	0	0
Compensation expense for restricted stock	3,560	0	0	0	3,560	0	0	0
Net gain (loss) on sale of long-term investment for comprehensive income	(55)	0	0	0	0	0	0	(55)
Issuance of shares in connection with an acquisitions	4,033	0	0	2	4,031	0	0	0
Vesting of restricted stock	(376)	0	0	0	(376)	0	0	0
Acquisition of treasury stock	(11,855)	0	0	0	0	0	(11,855)	0
Issuance of 66,676 treasury shares for vesting of restricted stock		0	0	0	(1,502)	0	1,502	0
Cumulative translation adjustment	(3,277)	0	0	0	0	0	0	(3,277)
Net income (loss)	(45,238)	0	0	0	0	(45,238)	0	0
BALANCES at Dec. 31, 2014	$ 242,952	$ 1	$ 15	$ 146	$ 115,605	$ 148,409	$ (15,524)	$ (5,700)