Fair Values of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
|
Dec. 31, 2016 |
Dec. 31, 2015 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Convertible note hedge asset |
$ 25,471,000
|
$ 0
|
| Convertible Debt Conversion Feature, Fair Value |
(30,708,000)
|
0
|
| Convertible Debt Bond Hedge [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Convertible note hedge asset |
25,471,000
|
|
| Foreign exchange forward | Fair Value, Measurements, Recurring |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
971,000
|
2,129,000
|
| Foreign exchange forward | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets / (Liabilities) - Level I |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
0
|
0
|
| Foreign exchange forward | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
971,000
|
2,129,000
|
| Foreign exchange forward | Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs - Level III |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
0
|
$ 0
|
| Convertible Debt Conversion Feature [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Convertible Debt Conversion Feature, Fair Value |
(30,708,000)
|
|
| Convertible Debt Bond Hedge [Member] | Fair Value, Measurements, Recurring |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
25,471,000
|
|
| Convertible Debt Bond Hedge [Member] | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets / (Liabilities) - Level I |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
0
|
|
| Convertible Debt Bond Hedge [Member] | Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs - Level III |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
0
|
|
| Convertible Debt Conversion Feature [Member] | Fair Value, Measurements, Recurring |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
(30,708,000)
|
|
| Convertible Debt Conversion Feature [Member] | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets / (Liabilities) - Level I |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
0
|
|
| Convertible Debt Conversion Feature [Member] | Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs - Level III |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative assets (liabilities), at fair value, net |
$ 0
|
|