Statements of Consolidated Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net (losses)/earnings	$ (44,948,000)	$ 36,433,000	$ 15,854,000
Less: Net earnings/(losses) from discontinued operations, net of tax	122,000	1,032,000	(1,534,000)
(Losses)/earnings from continuing operations	(45,070,000)	35,401,000	17,388,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	62,852,000	52,396,000	50,513,000
Impairment of goodwill	5,500,000	0	9,796,000
Impairment of property, plant and equipment	8,216,000	1,007,000	0
(Loss)/gain on disposal of property, plant and equipment and equity method investments	153,000	(938,000)	(20,275,000)
(Gain) on extinguishment of debt	0	(1,200,000)	0
Losses/(earnings) from unconsolidated companies, net of tax	10,213,000	(11,013,000)	(9,075,000)
Amortization of debt issuance costs and discount on secured term loan	3,682,000	3,044,000	2,903,000
Share-based compensation	5,809,000	6,272,000	6,707,000
Change in provisions for uncertain tax positions	160,000	(3,350,000)	279,000
Benefit from deferred income tax	(13,641,000)	(305,000)	(124,000)
Other non-cash movements	1,596,000	567,000	(1,076,000)
Effect of exchange rates on net (losses)/earnings	2,215,000	(12,258,000)	896,000
Change in assets and liabilities, net of effects from acquisitions:
Accounts receivable	(633,000)	1,961,000	(536,000)
Due from unconsolidated companies	(419,000)	(788,000)	1,167,000
Prepaid expense and other	(349,000)	668,000	(725,000)
Inventories	2,539,000	(504,000)	1,962,000
Escrow and prepaid customer deposits	(1,082,000)	379,000	(1,284,000)
Accounts payable	(2,488,000)	877,000	(5,703,000)
Accrued liabilities	12,805,000	245,000	10,127,000
Deferred revenue	(489,000)	(1,434,000)	5,877,000
Other liabilities	(5,633,000)	(14,121,000)	0
Other, net	927,000	148,000	(3,008,000)
Other cash movements:
Dividends from equity method investees	4,440,000	4,449,000	3,649,000
Proceeds from insurance settlements	1,462,000	0	0
Payment of swap termination costs	(2,145,000)	0	0
Net cash provided by operating activities from continuing operations	50,620,000	61,503,000	69,458,000
Net cash provided by/(used in) operating activities from discontinued operations	87,000	38,000	(1,534,000)
Net cash provided by operating activities	50,707,000	61,541,000	67,924,000
Cash flows from investing activities:
Capital expenditure to acquire property, plant and equipment	(67,830,000)	(55,104,000)	(56,395,000)
Capital expenditure to acquire intangible assets	0	0	(714,000)
Acquisitions, net of cash acquired	(68,632,000)	0	0
Investments in unconsolidated companies	0	0	(4,061,000)
Increase in restricted cash	(46,000)	(6,000)	0
Release of restricted cash	0	0	519,000
Change in deferred revenue for asset sale deposits	0	0	(500,000)
Proceeds from sale of business	2,070,000	0	0
Proceeds from insurance settlements	13,588,000	0	0
Proceeds from sale of property, plant and equipment and equity method investments	0	2,746,000	43,742,000
Net cash used in investing activities from continuing operations	(120,850,000)	(52,364,000)	(17,409,000)
Net cash provided by investing activities from discontinued operations	0	0	0
Net cash used in investing activities	(120,850,000)	(52,364,000)	(17,409,000)
Cash flows from financing activities:
Repurchase of shares	0	(1,992,000)	(37,565,000)
Exercised stock options and vested share awards	305,000	17,000	35,000
Dividend to non-controlling interest	0	(15,000)	(20,000)
Issuance of long-term debt	104,739,000	26,000,000	0
Debt issuance costs	(9,639,000)	(465,000)	(856,000)
Principal payments under long-term debt	(5,654,000)	(13,904,000)	(5,432,000)
Net cash provided by/(used in) financing activities from continuing operations	89,751,000	9,641,000	(43,838,000)
Net cash provided by financing activities from discontinued operations	0	0	0
Net cash provided by/(used in) financing activities	89,751,000	9,641,000	(43,838,000)
Effect of exchange rate changes on cash and cash equivalents	7,120,000	(992,000)	(6,196,000)
Net increase in cash and cash equivalents	26,728,000	17,826,000	481,000
Cash and cash equivalents at beginning of period (includes $Nil, $Nil and $Nil of cash presented within assets held for sale)	153,425,000	135,599,000	135,118,000
Cash and cash equivalents at end of period (includes $Nil, $Nil, $Nil of cash presented within assets held for sale)	$ 180,153,000	$ 153,425,000	$ 135,599,000