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Debt, Convertible Note (Details) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 16, 2016 USD ($) | Jun. 30, 2017 USD ($) $ / shares | Jun. 30, 2017 USD ($) d $ / shares shares | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Net Carrying Amount of Liability Component [Abstract] |  |  |  |  |  |  |
Unamortized debt discount (conversion option) |  | $ (11,000,000) |  | $ (11,000,000) |  |  |
Unamortized debt discount (issuance costs) |  | (4,800,000) |  | (4,800,000) |  |  |
Debt issuance costs |  |  |  | 0 |  | $ 6,596,000 |
Convertible Note [Member] |  |  |  |  |  |  |
Convertible Debt [Abstract] |  |  |  |  |  |  |
Original principal amount | $ 210,000,000 | $ 210,000,000 |  | $ 210,000,000 |  |  |
Interest rate |  | 4.75% |  | 4.75% |  |  |
Maturity date |  |  |  | Jun. 15, 2020 |  |  |
Redemption price, percentage of principal amount redeemed |  |  |  | 100.00% |  |  |
Threshold percentage of stock price trigger |  |  |  | 180.00% |  |  |
Threshold trading days | d |  |  |  | 20 |  |  |
Threshold final trading days | d |  |  |  | 3 |  |  |
Threshold consecutive trading days |  |  |  | 30 days |  |  |
Principal amount increments that can be repurchased upon a change in control or termination of trading of common stock |  |  |  | $ 1,000 |  |  |
Principal amount increments that can be converted |  |  |  | $ 1,000 |  |  |
Holding period following issue date before notes can be converted |  |  |  | 6 months |  |  |
Initial conversion rate (in shares) | shares |  |  |  | 21.5054 |  |  |
Initial conversion price (in dollars per share) | $ / shares |  | $ 46.50 |  | $ 46.50 |  |  |
Proceeds from issuance of notes | 210,000,000 |  |  |  |  |  |
Liability component of convertible notes | 199,100,000 |  |  |  |  |  |
Equity component of convertible notes allocated to additional paid-in capital | $ 10,900,000 |  |  |  |  |  |
Effective interest rate |  | 7.10% |  | 7.10% |  |  |
Net Carrying Amount of Liability Component [Abstract] |  |  |  |  |  |  |
Principal |  | $ 210,000,000 | [1],[2] | $ 210,000,000 | [1],[2] |  | $ 210,000,000
Unamortized debt discount (conversion option) |  | (8,372,000) |  | (8,372,000) |  |  |
Total long-term debt, net |  | 201,628,000 |  | 201,628,000 |  |  |
Unamortized debt discount (issuance costs) |  | (4,791,000) |  | (4,791,000) |  |  |
Net carrying amount |  | 196,837,000 |  | 196,837,000 |  |  |
Debt issuance costs |  |  |  | 6,600,000 |  |  |
Additions to deferred financing cost |  |  |  | 6,300,000 |  |  |
Adjustments to additional paid-in capital for debt issuance costs |  |  |  | $ 300,000 |  |  |
Interest expense |  | 3,500,000 |  |  |  |  |
Contractual interest |  | 2,500,000 |  |  |  |  |
Amortization of debt issuance costs and debt discount |  | $ 1,000,000 |  |  |  |  |
[1] | As of June 30, 2017, the current portion of the Company's debt (i.e. becoming due in the next 12 months) included $15.1 million of the balance of its U.S. dollar denominated debt under the Credit Agreement facility, $7.0 million of the balance of its Japanese yen-denominated debt under the Credit Agreement facility and $5.9 million of the Japan subsidiary loan. The Company has classified the $72.5 million borrowed under the revolving line of credit as short term because it is the Company's intention to use the line of credit to borrow and pay back funds over short periods of time.
[2] | The carrying value of the debt reflects the amounts stated in the above table less a debt discount of $11.0 million and debt issuance costs of $4.8 million (consisting of $13.2 million related to the Convertible Note and $2.6 million related to the credit agreement), which is not reflected in this table.

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