CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Common Stock [Member]	Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Non-Control Interest [Member]	Accum. Other Comp. Income [Member]	Total
BALANCES at Dec. 31, 2014	$ 1	$ 15	$ 146	$ 115,605	$ 148,409	$ (15,524)	$ 0	$ (5,700)	$ 242,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid	0	0	0	0	(90)	0	0	0	(90)
Compensation expense for restricted stock	0	0	0	2,973	0	0	0	0	2,973
Tax related items for share based awards	0	0	0	(815)	0	0	0	0	(815)
Issuance of 148,769 treasury shares in connection with an acquisition	0	0	0	(4,825)	0	9,223	0	0	4,398
Acquisition of 191,420 shares of treasury stock	0	0	0	0	0	(8,908)	0	0	(8,908)
Issuance of treasury shares upon vesting of restricted stock	0	0	0	(2,632)	0	2,632	0	0	0
Noncontrolling interest holder contributions, net of tax benefits	0	0	0	0	0	0	2,346	0	2,346
Cumulative translation adjustment	0	0	0	0	0	0	0	(4,916)	(4,916)
Net income (loss)	0	0	0	0	(38,536)	0	(534)	0	(39,070)
BALANCES at Dec. 31, 2015	1	15	146	110,306	109,783	(12,577)	1,812	(10,616)	198,870
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid	0	0	0	0	(90)	0	0	0	(90)
Compensation expense for restricted stock	0	0	0	3,580	0	0	0	0	3,580
Tax related items for share based awards	0	0	0	(858)	0	0	0	0	(858)
Issuance of shares of Common stock	0	0	27	51,862	0	0	0	0	51,889
Issuance of treasury shares upon vesting of restricted stock	0	0	0	(12,577)	0	12,577	0	0	0
Noncontrolling interest holder contributions, net of tax benefits	0	0	0	0	0	0	(335)	0	(335)
Cumulative translation adjustment	0	0	0	0	0	0	0	(7,658)	(7,658)
Net income (loss)	0	0	0	0	7,702	0	(551)	0	7,151
BALANCES at Dec. 31, 2016	1	15	173	152,313	117,395	0	926	(18,274)	252,549
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid	0	0	0	0	(90)	0	0	0	(90)
Compensation expense for restricted stock	0	0	0	1,708	0	0	0	0	1,708
Tax related items for share based awards	0	0	0	(933)	0	0	0	0	(933)
Issuance of shares of Common stock	0	0	1	(1)	0	0	0	0	0
Cumulative translation adjustment	0	0	0	0	0	0	0	(1,217)	(1,217)
Net income (loss)	0	0	0	0	16,888	0	(359)	0	16,529
BALANCES at Dec. 31, 2017	$ 1	$ 15	$ 174	$ 153,087	$ 134,193	$ 0	$ 567	$ (19,491)	$ 268,546