Financing Arrangements (Details Textual) - USD ($)		1 Months Ended	3 Months Ended	12 Months Ended
	May 12, 2016	May 31, 2016	Jun. 30, 2016	Dec. 31, 2021	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jan. 01, 2017	Mar. 31, 2015
Gain on extinguishment of debt					$ 1,615,000	$ 0	$ 0
Conversion price percentage					130.00%
Business day period					5 days
Consecutive trading day period					5 days
Percent threshold last reported sale price					98.00%
Net deferred tax liabilities					$ (36,996,000)	(24,547,000)
Long-term debt, excluding current maturities					72,900,000	171,211,000
Non-cash charge, interest expense					1,058,000	0
Secured debt outstanding					0
Current debt					83,368,000	7,382,000
Restricted cash and cash equivalents, current					6,539,000
Interest expense					9,900,000	9,100,000	10,400,000
Interest costs capitalized						1,128,000	$ 751,000
Prepaid Expenses and Other Current Assets [Member]
Restricted cash and cash equivalents, current					7,421,000	17,485,000
Foreign Operations [Member]
Current debt					380,000	$ 7,392,000
Restricted cash and cash equivalents, current					$ 882,000
Scenario, forecast [Member]
Interest costs capitalized				$ 926,000
Repayments of debt				$ 100,000,000
Senior notes [Member]
Debt conversion, converted shares for basis principal (shares)					107.1381
Debt conversion, principal amount as basis for conversion rate					$ 1,000
Debt instrument, convertible, threshold trading days					20
Debt instrument, convertible, threshold consecutive trading days					30 days
Net deferred tax liabilities					$ (8,700,000)
Interest rate, effective percentage					11.30%
Convertible Notes due 2017 [Member] | Senior notes [Member]
Debt instrument, face amount					$ 172,500,000.0
Unsecured debt, principal amount					$ 83,300,000
Interest rate, stated percentage					4.00%
Debt conversion, converted shares for basis principal (shares)					90.8893
Debt conversion, principal amount as basis for conversion rate					$ 1,000
Debt Instrument, convertible, conversion price (dollars per share)					$ 11.00
Repurchased face amount					$ 89,300,000
Debt instrument, repurchase amount					87,300,000
Convertible Notes due 2021 [Member] | Senior notes [Member]
Debt instrument, face amount					$ 100,000,000
Interest rate, stated percentage					4.00%
Debt Instrument, convertible, conversion price (dollars per share)					$ 9.33
ABL Facility [Member] | Federal Funds Rate [Member]
Base rate basis spread on variable rate	0.50%	0.50%
ABL Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Base rate basis spread on variable rate	1.00%	1.00%
Basis spread on variable rate	3.50%	3.50%
ABL Facility [Member] | Base Rate [Member]
Basis spread on variable rate	2.50%	2.50%
ABL Facility [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Basis spread on variable rate	2.25%	2.25%
ABL Facility [Member] | Minimum [Member] | Base Rate [Member]
Basis spread on variable rate	1.25%	1.25%
ABL Facility [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Basis spread on variable rate	3.50%	3.50%
ABL Facility [Member] | Maximum [Member] | Base Rate [Member]
Basis spread on variable rate	2.50%	2.50%
ABL Facility [Member] | Revolving Credit Facility [Member]
Maximum borrowing capacity		$ 90,000,000.0
Fixed charge coverage ratio, amount	$ 25,000,000	$ 25,000,000
Remaining borrowing capacity					$ 60,500,000
Unused capacity, commitment fee percentage					0.625%
Covenant terms acceleration of other indebtedness	$ 25,000,000
ABL Facility [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Unused capacity, commitment fee percentage	0.375%	0.375%
ABL Facility [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Maximum borrowing capacity		$ 150,000,000.0
Unused capacity, commitment fee percentage	0.625%	0.625%
ABL Facility [Member] | Revolving Credit Facility [Member] | Scenario, forecast [Member]
Remaining borrowing capacity								$ 76,300,000
Credit Agreement [Member]
Letters of credit outstanding, amount					$ 5,948,000
Credit Agreement [Member] | Foreign Operations [Member]
Letters of credit outstanding, amount					11,282,000
Credit Agreement [Member] | Revolving Credit Facility [Member]
Maximum borrowing capacity					150,000,000				$ 200,000,000
Long-term line of credit		$ 0
Non-cash charge, interest expense			$ 1,100,000
Convertible debt, debt component [Member]
Debt issuance cost					2,700,000
Long-term debt, excluding current maturities					72,900,000
Unamortized debt discount					$ 24,400,000
Convertible debt, debt component [Member] | Senior notes [Member]
Interest rate, stated percentage					10.487%
Debt instrument, fair value					$ 75,200,000
Convertible debt, equity component [Member]
Debt instrument, conversion equity amount					24,800,000
Debt issuance cost					900,000
Debt instrument, conversion equity, carrying amount net of issuance costs and deferred tax liability					$ 15,200,000