Fair Values of Financial Instruments - Details of Book Value and Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Carrying Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Cash and cash equivalents |
$ 124,234
|
$ 60,055
|
| Other investments |
108
|
160
|
| Installment receivables, net of reserves |
1,834
|
1,793
|
| Long-term debt (including current maturities of long-term debt) |
(161,349)
|
(47,120)
|
| Fair Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Cash and cash equivalents |
124,234
|
60,055
|
| Other investments |
108
|
160
|
| Installment receivables, net of reserves |
1,834
|
1,793
|
| Long-term debt (including current maturities of long-term debt) |
(164,900)
|
(47,369)
|
| Foreign exchange forward | Other Long-Term Obligations | Carrying Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative liabilities |
(30,708)
|
0
|
| Foreign exchange forward | Other Long-Term Obligations | Fair Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative liabilities |
(30,708)
|
0
|
| Foreign exchange forward | Other Long-Term Assets [Member] | Carrying Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative assets |
25,471
|
0
|
| Foreign exchange forward | Other Long-Term Assets [Member] | Fair Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative assets |
25,471
|
0
|
| Foreign exchange forward | Other Current Assets | Carrying Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative assets |
2,754
|
4,143
|
| Foreign exchange forward | Other Current Assets | Fair Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative assets |
2,754
|
4,143
|
| Foreign exchange forward | Accrued Expenses | Carrying Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative liabilities |
(1,783)
|
(2,014)
|
| Foreign exchange forward | Accrued Expenses | Fair Value |
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative liabilities |
$ (1,783)
|
$ (2,014)
|