Financing Arrangements - Narrative (Details)					3 Months Ended	12 Months Ended
	Jun. 01, 2016 USD ($)	Feb. 16, 2016 USD ($)	Apr. 17, 2014 USD ($)	Jun. 01, 2011 USD ($) $ / shares	Mar. 31, 2012 day $ / shares	Dec. 31, 2018 USD ($) letter_of_credit	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 loan_agreement
Debt Instrument [Line Items]
Number of term loan agreements | loan_agreement										2
Amortization of deferred financing costs						$ 5,216,000	$ 5,216,000	$ 10,791,000
Convertible Debt
Debt Instrument [Line Items]
Amortization of deferred financing costs								136,000
Interest expense								1,573,000
Stated interest rate						3.50%
Loss on conversion									$ 1,200,000
Notes | Senior Notes
Debt Instrument [Line Items]
Convertible notes payable				$ 120,000,000.0
Stated interest rate				3.50%
Proceeds from convertible debt after deducting underwriting fees and other related expenses				$ 115,300,000
Initial conversion price (in Dollars per share) | $ / shares				$ 8.76
Conversion ratio				0.1141553
Stock price trigger for conversion (in Dollars per share) | $ / shares					$ 11.39
Convertible threshold trading days (in day) | day					20
Convertible threshold consecutive trading days | day					30
Original amount of debt converted	$ 43,200,000								$ 44,300,000
Notes | Senior Notes | Over-Allotment Option
Debt Instrument [Line Items]
Convertible notes payable				$ 20,000,000.0
JP Morgan | JPM Revolving Facility
Debt Instrument [Line Items]
Potential maximum borrowing capacity			$ 200,000,000.0
Potential increase in basis spread on variable rate in event of default			2.00%
Covenant, minimum liquidity			$ 120,000,000.0
Covenant, minimum liquidity, additional percentage of commitments			25.00%
Covenant, minimum EBITDA to fixed charges ratio			1.00
Rolling quarterly measurement duration			12 months
JP Morgan | Term Loan Facility
Debt Instrument [Line Items]
Repayments of long-term debt		$ 200,000,000
Aggregate principal amount financed						$ 1,045,000,000
Amount outstanding under credit facility						$ 831,900,000
Market price per $1 of principal						0.821
Amortization of deferred financing costs						$ 5,000,000	5,000,000	10,400,000
Unamortized debt financing costs						11,500,000
Interest expense						56,900,000	$ 45,500,000	$ 43,500,000
JP Morgan | Revolving Credit Facility | JPM Revolving Facility
Debt Instrument [Line Items]
Amount outstanding under credit facility						0
Maximum borrowing capacity			$ 150,000,000.0
Borrowing base, percent of eligible accounts receivable			85.00%
Borrowing base, percent of materials and WIP on FIFO			65.00%
Borrowing base, percent of liquidation value			85.00%
Borrowing base, percent of finished goods			75.00%
Borrowing base, percent of liquidation of finished goods			85.00%
Borrowing base, percent of eligible inventory liquidation value			85.00%
Borrowing base, percent of market value finished goods			75.00%
Commitment fees, minimum availability under credit facility			12.50%
Commitment fee, threshold, amount of commitments			$ 15,000,000.0
Commitment fee, threshold, number of consecutive days			30 days
Debt instrument term			5 years
Unused line fee			0.25%
JP Morgan | Letter of Credit | JPM Revolving Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 10,000,000
JP Morgan | JPM Revolving Facility
Debt Instrument [Line Items]
Amount outstanding under credit facility						$ 0
JP Morgan | JPM Revolving Facility | Letter of Credit
Debt Instrument [Line Items]
Letters of credit outstanding (in letter of credit) | letter_of_credit						0
JP Morgan | JPM Revolving Facility | JPM Revolving Facility
Debt Instrument [Line Items]
Remaining borrowing capacity						$ 135,000,000