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Condensed Consolidated Statements of Shareholders' Equity Statement - USD ($)	Total	Director	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Director	Common Stock [Member]	Common Stock [Member] Director	Retained Earnings	Retained Earnings Director	AOCI Attributable to Parent	AOCI Attributable to Parent Director
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Value, Issued	$ 238,000
Additional Paid in Capital, Common Stock	287,256,000
Retained Earnings (Accumulated Deficit)	290,441,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(114,350,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	463,585,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	$ (537,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	68,369
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	11,236
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (2,969,000)		$ 0		$ 0		$ (2,969,000)		$ 0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax			0		0		0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax | Accounting Standards Update 2016-01 [Member]	(2,802,000)								(2,802,000)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(13,000)		0		0		0		(13,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	1,869,000		0		0		0		1,869,000
Stock Issued During Period, Value, Stock Options Exercised	183,000		183,000		0		0		0
Stock based compensation	2,071,000		2,071,000		0		0		0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(926,000)		(927,000)		(1,000)		0		0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	4,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	(3,259,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(479,000)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	18,648,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	169,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	11,652,000
Stock based compensation	5,840,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	$ (49,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	125,000
Common Stock, Value, Issued	$ 239,000
Additional Paid in Capital, Common Stock	288,583,000
Retained Earnings (Accumulated Deficit)	287,472,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(109,692,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	466,602,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	$ (2,817,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	35,023
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	12,220
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (4,104,000)		0		0		(4,104,000)		0
Stock Issued During Period, Value, Stock Dividend	(1,433,000)		0		0		(1,433,000)		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	6,631,000		0		0		0		6,631,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	82,000		0		0		0		82,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	10,071,000		0		0		0		10,071,000
Stock Issued During Period, Value, Stock Options Exercised	243,000		243,000				0		0
Stock based compensation	1,649,000		1,649,000		0		0		0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(54,000)		(54,000)		0		0		0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	269,000			$ 269,000		$ 0		$ 0		$ 0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(24,000)
Common Stock, Value, Issued	239,000
Additional Paid in Capital, Common Stock	290,690,000
Retained Earnings (Accumulated Deficit)	281,935,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(92,908,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	479,956,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	$ 81,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	4,954
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	66,965
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 6,594,000		0		0		6,594,000		0
Stock Issued During Period, Value, Stock Dividend	(1,434,000)		0		0		(1,434,000)		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	9,216,000		0		0		0		9,216,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	100,000		0		0		0		100,000
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	100,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	(288,000)		0		0		0		(288,000)
Stock Issued During Period, Value, Stock Options Exercised	1,400,000		1,399,000		1,000		0		0
Stock based compensation	1,716,000	$ 135,000	1,716,000		0		0		0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(71,000)		(71,000)		0		0		0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture				135,000		0		0		0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(29,000)
Common Stock, Value, Issued	240,000
Additional Paid in Capital, Common Stock	293,869,000
Retained Earnings (Accumulated Deficit)	287,095,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(83,880,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	497,324,000
Common Stock, Value, Issued					240,000
Additional Paid in Capital, Common Stock			296,093,000
Retained Earnings (Accumulated Deficit)							293,802,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(59,986,000)								(59,986,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	530,149,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	$ 34,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	58,081
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	12,682
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (7,263,000)		0		0		(7,263,000)		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	2,076,000		0		0		0		2,076,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	96,000		0		0		0		96,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	(97,000)		0		0		0		(97,000)
Payments of Stock Issuance Costs	8,340,000
Proceeds from Other Equity	198,705,000		198,662,000		43,000		0		0
Stock Issued During Period, Value, Stock Options Exercised	290,000		290,000		0		0		0
Stock based compensation	2,262,000		2,262,000		0		0		0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(1,765,000)		(1,766,000)		1,000		0		0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(31,000)
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	(93,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	17,834,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(4,365,000)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(2,489,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	266,000
Stock based compensation	8,485,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	824,000
Common Stock, Value, Issued			284,000
Additional Paid in Capital, Common Stock			495,541,000
Retained Earnings (Accumulated Deficit)							286,539,000
Accumulated Other Comprehensive Income (Loss), Net of Tax									(57,911,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	724,453,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	$ (74,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	32,665
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	38,744
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 15,203,000		0		0		15,203,000		0
Stock Issued During Period, Value, Stock Dividend	(1,706,000)		0		0		(1,706,000)		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(4,226,000)		0		0		0		(4,226,000)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(2,995,000)		0		0		0		(2,995,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	212,000		0		0		0		212,000
Stock Issued During Period, Value, Stock Options Exercised	1,122,000		1,122,000		0		0		0
Stock based compensation	2,762,000	480,000	2,762,000	480,000	0	0	0	0	0	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(147,000)		(147,000)		0		0		0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	986
Common Stock, Value, Issued	284,000
Additional Paid in Capital, Common Stock	499,758,000
Retained Earnings (Accumulated Deficit)	300,036,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(64,920,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	735,158,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Transition Asset (Obligation), Reclassification Adjustment from AOCI, before Tax	$ (52,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	5,937
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	47,292
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 9,894,000		0		0		9,894,000		0
Stock Issued During Period, Value, Stock Dividend	(1,707,000)		0		0				0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(2,215,000)		0		0		0		(2,215,000)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	410,000		0		0		0		410,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent	151,000		0		0		0		151,000
Proceeds from Other Equity	198,705,000
Stock Issued During Period, Value, Stock Options Exercised	1,108,000		1,107,000		1,000		0		0
Stock based compensation	2,741,000	$ 240,000		$ 240,000	0	$ 0	0	$ 0	0	$ 0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	(145,000)		$ (145,000)		$ 0		$ 0		$ 0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(136,000)
Common Stock, Value, Issued	285,000
Additional Paid in Capital, Common Stock	503,701,000
Retained Earnings (Accumulated Deficit)	308,223,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(66,574,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 745,635,000

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.

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Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive (income) loss for defined benefit plan, attributable to parent entity.

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Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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