Consolidated Statements of Equity (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Restricted Stock [Member]	Restricted Stock [Member] Common Stock [Member]	Restricted Stock [Member] Additional Paid-in Capital [Member]	Restricted Stock [Member] Retained Earnings [Member]	Restricted Stock [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Restricted Stock [Member] Noncontrolling Interest [Member]	Restricted Stock Units (RSUs) [Member]	Restricted Stock Units (RSUs) [Member] Common Stock [Member]	Restricted Stock Units (RSUs) [Member] Additional Paid-in Capital [Member]	Restricted Stock Units (RSUs) [Member] Retained Earnings [Member]	Restricted Stock Units (RSUs) [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Restricted Stock Units (RSUs) [Member] Noncontrolling Interest [Member]
Balance at Dec. 31, 2012	$ 716,120	$ 390	$ 257,209	$ 426,457	$ 15,260	$ 16,804
Balance (in Shares) at Dec. 31, 2012		38,952,561
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,337	0	0	2,711	0	626
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		29,511
Stock Issued During Period, Value, Stock Options Exercised	634	0	634	0	0	0
Restricted shares issued							4	4	0	0	0	0	0	0	0	0	0	0
Restricted shares issued (in Shares)								395,927						10,661
Issuance of shares pursuant to deferred stock unit awards (in Shares)		3,171
Forfeitures of restricted shares	0	0	0	0	0	0
Forfeitures of restricted shares (in Shares)		(1,644)
Shares repurchased and retired	4,582	(2)	(4,580)	0	0	0
Shares repurchased and retired (in Shares)		(200,038)
Equity-based compensation expense	1,835	0	1,835	0	0	0
Currency translation adjustment and derivative transactions, net	(9,592)	0	0	0	(9,481)	(111)
Balance at Mar. 31, 2013	707,756	392	255,098	429,168	5,779	17,319
Balance (in Shares) at Mar. 31, 2013		39,190,149
Balance at Dec. 31, 2013	726,921	380	236,128	470,808	2,052	17,553
Balance (in Shares) at Dec. 31, 2013	37,983,114	37,983,114
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,428	0	0	4,397	0	31
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	75,657	75,657
Stock Issued During Period, Value, Stock Options Exercised	1,092	1	1,091	0	0	0
Restricted shares issued							2	2	0	0	0	0	0	0	0	0	0	0
Restricted shares issued (in Shares)								216,880						15,277
Issuance of shares pursuant to deferred stock unit awards (in Shares)		4,171
Forfeitures of restricted shares	0	0	0	0	0	0
Forfeitures of restricted shares (in Shares)		(8,921)
Shares repurchased and retired	5,475	(3)	(5,472)	0	0	0
Shares repurchased and retired (in Shares)		(239,075)
Equity-based compensation expense	1,284	0	1,284	0	0
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	(617)	0	(909)	0	0	292
Currency translation adjustment and derivative transactions, net	(2,534)	0	0	0	(2,305)	(229)
Balance at Mar. 31, 2014	$ 725,101	$ 380	$ 232,122	$ 475,205	$ (253)	$ 17,647
Balance (in Shares) at Mar. 31, 2014	38,047,103	38,047,103