Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member] Restricted Stock Units (RSUs) [Member]	Common Stock [Member] Performance Shares [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Restricted Stock Units (RSUs) [Member]	Performance Shares [Member]	Total
Balance, beginning of period (in shares) at Dec. 31, 2018			31,922,409
Issuance of common stock upon stock option exercises (in shares)										52,783
Balance, end of period (in shares) at Mar. 31, 2019			31,491,872
Balance, beginning of period at Dec. 31, 2018			$ 319	$ 122,818	$ 379,890	$ (40,290)	$ 7,450			$ 470,187
Balance, end of period at Mar. 31, 2019			$ 315	111,597	375,889	(40,508)	7,277			454,570
Balance, beginning of period (in shares) at Dec. 31, 2018			31,922,409
Issuance of common stock upon stock option exercises (in shares)			52,783
Issuance of shares pursuant to restricted stock units (in shares)	205,274	111,158
Issuance of shares pursuant to deferred stock units (in shares)			77,486
Shares repurchased and retired (in shares)			(1,427,716)
Balance, end of period (in shares) at Jun. 30, 2019			30,941,394
Balance, beginning of period at Dec. 31, 2018			$ 319	122,818	379,890	(40,290)	7,450			470,187
Issuance of common stock upon stock option exercises			1	955						956
Issuance of shares pursuant to restricted stock units	$ 2	$ 1						$ 2	$ 1
Issuance of shares pursuant to deferred stock units			1							1
Shares repurchased and retired			(15)	(25,156)						(25,171)
Balance, end of period at Jun. 30, 2019			$ 309	102,841	367,523	(42,940)	6,290			434,023
Equity-based compensation expense				4,224						4,224
Net income (loss)					(12,367)		229			(12,138)
Currency translation adjustment and derivative transactions, net						(2,650)	20			(2,630)
Distributions to non-controlling interests							(1,409)			(1,409)
Balance, beginning of period (in shares) at Mar. 31, 2019			31,491,872
Issuance of common stock upon stock option exercises (in shares)			0
Issuance of shares pursuant to restricted stock units (in shares)	33,699	502
Issuance of shares pursuant to deferred stock units (in shares)			68,048
Shares repurchased and retired (in shares)			(652,727)
Balance, end of period (in shares) at Jun. 30, 2019			30,941,394
Balance, beginning of period at Mar. 31, 2019			$ 315	111,597	375,889	(40,508)	7,277			454,570
Issuance of common stock upon stock option exercises			0	0						0
Issuance of shares pursuant to restricted stock units	$ 0	$ 0						0	0
Issuance of shares pursuant to deferred stock units			1							1
Shares repurchased and retired			(7)	(10,973)						(10,980)
Balance, end of period at Jun. 30, 2019			$ 309	102,841	367,523	(42,940)	6,290			434,023
Equity-based compensation expense				2,217						2,217
Net income (loss)					(8,366)		219			(8,147)
Currency translation adjustment and derivative transactions, net						(2,432)	107			(2,325)
Distributions to non-controlling interests							(1,313)			$ (1,313)
Balance, beginning of period (in shares) at Dec. 31, 2019			30,715,959							30,715,959
Issuance of common stock upon stock option exercises (in shares)			0
Issuance of shares pursuant to restricted stock units (in shares)	188,545	71,541
Issuance of shares pursuant to deferred stock units (in shares)			56,582
Shares repurchased and retired (in shares)			(264,228)
Balance, end of period (in shares) at Jun. 30, 2020			30,768,399							30,768,399
Balance, beginning of period at Dec. 31, 2019			$ 307	101,148	358,998	(32,694)	7,334			$ 435,093
Issuance of common stock upon stock option exercises			0	0						0
Issuance of shares pursuant to restricted stock units	$ 2	$ 1						2	1
Issuance of shares pursuant to deferred stock units			1							1
Shares repurchased and retired			(3)	(5,101)						(5,104)
Balance, end of period at Jun. 30, 2020			$ 308	100,490	361,222	(39,962)	7,560			429,618
Equity-based compensation expense				4,443						4,443
Net income (loss)					2,224		469			2,693
Currency translation adjustment and derivative transactions, net						(7,268)	(90)			(7,358)
Distributions to non-controlling interests							(153)			$ (153)
Balance, beginning of period (in shares) at Mar. 31, 2020			30,679,476
Issuance of common stock upon stock option exercises (in shares)			0
Issuance of shares pursuant to restricted stock units (in shares)	35,949	0
Issuance of shares pursuant to deferred stock units (in shares)			56,582
Shares repurchased and retired (in shares)			(3,608)
Balance, end of period (in shares) at Jun. 30, 2020			30,768,399							30,768,399
Balance, beginning of period at Mar. 31, 2020			$ 307	98,103	357,366	(42,947)	7,400			$ 420,229
Issuance of common stock upon stock option exercises			0	0						0
Issuance of shares pursuant to restricted stock units	$ 0	$ 0						$ 0	$ 0
Issuance of shares pursuant to deferred stock units			1							1
Shares repurchased and retired			0	(56)						(56)
Balance, end of period at Jun. 30, 2020			$ 308	100,490	361,222	(39,962)	7,560			429,618
Equity-based compensation expense				$ 2,443						2,443
Net income (loss)					$ 3,856		140			3,996
Currency translation adjustment and derivative transactions, net						$ 2,985	173			3,158
Distributions to non-controlling interests							$ (153)			$ (153)