Financing Arrangements and Fair Value of Financial Instruments (Details Textual)		1 Months Ended		3 Months Ended		12 Months Ended
	May 12, 2016 USD ($)	May 31, 2016 USD ($)	Sep. 30, 2010 USD ($) shares	Mar. 31, 2017 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) trading_day $ / shares shares	Dec. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)
Conversion price percentage						130.00%
Business day period						5 days
Consecutive trading day period						5 days
Percent threshold last reported sale price						98.00%
Debt issuance cost				$ 2,600,000
Long-term debt, excluding current maturities				73,936,000		$ 72,900,000
Long-term debt				157,022,000		156,268,000
Current debt				83,086,000		83,368,000
Restricted cash and cash equivalents, current				6,500,000
Prepaid Expenses and Other Current Assets
Restricted cash and cash equivalents, current				7,500,000		7,400,000
Foreign Operations
Current debt				0		$ 0
Restricted cash and cash equivalents, current				$ 900,000
Senior notes
Debt conversion, converted shares for basis principal (shares) | shares						107.1381
Debt conversion, principal amount as basis for conversion rate						$ 1,000
Debt instrument, convertible, threshold trading days | trading_day						20
Debt instrument, convertible, threshold consecutive trading days						30 days
Net deferred tax liabilities						$ 8,700,000
Interest rate, effective percentage				11.40%
Convertible Notes due 2017 | Senior notes
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) | shares			90.8893
Debt conversion, principal amount as basis for conversion rate			$ 1,000
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares						$ 11
Debt instrument, fair value				$ 83,400,000		$ 84,400,000
Long-term debt				83,077,000		82,988,000
Convertible Notes due 2021 | Senior notes
Debt instrument, face amount						100,000,000
Unsecured debt, principal amount				113,900,000		$ 110,500,000
Interest rate, stated percentage						4.00%
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares						$ 9.33
Long-term debt				73,936,000		$ 72,900,000
ABL Facility | Federal Funds Rate
Base rate basis spread on variable rate	0.50%	0.50%
ABL Facility | London Interbank Offered Rate (LIBOR)
Base rate basis spread on variable rate	1.00%	1.00%
Basis spread on variable rate	3.50%	3.50%
ABL Facility | Base Rate
Basis spread on variable rate	2.50%	2.50%
ABL Facility | Minimum | London Interbank Offered Rate (LIBOR)
Basis spread on variable rate	2.25%	2.25%
ABL Facility | Minimum | Base Rate
Basis spread on variable rate	1.25%	1.25%
ABL Facility | Maximum | London Interbank Offered Rate (LIBOR)
Basis spread on variable rate	3.50%	3.50%
ABL Facility | Maximum | Base Rate
Basis spread on variable rate	2.50%	2.50%
ABL Facility | Revolving credit facility
Maximum borrowing capacity		$ 90,000,000.0
Fixed charge coverage ratio, amount	$ 25,000,000	$ 25,000,000
Long-term debt				0		$ 0
Remaining borrowing capacity				$ 90,000,000
Unused capacity, commitment fee percentage				0.625%
Covenant terms acceleration of other indebtedness	$ 25,000,000
ABL Facility | Revolving credit facility | Minimum
Unused capacity, commitment fee percentage	0.375%	0.375%
ABL Facility | Revolving credit facility | Maximum
Maximum borrowing capacity		$ 150,000,000.0
Unused capacity, commitment fee percentage	0.625%	0.625%
Credit Agreement
Letters of credit outstanding, amount				$ 6,000,000
Credit Agreement | Foreign Operations
Letters of credit outstanding, amount				11,400,000
Credit Agreement | Revolving credit facility
Maximum borrowing capacity							$ 150,000,000.0	$ 200,000,000.0
Long-term line of credit		$ 0
Interest Costs Incurred					$ 1,100,000
Convertible debt, debt component
Debt issuance cost				2,700,000
Long-term debt, excluding current maturities				73,900,000
Unamortized debt discount				23,500,000
Convertible debt, debt component | Senior notes
Interest rate, stated percentage						10.50%
Debt instrument, fair value						$ 75,200,000
Convertible debt, equity component
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