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Borrowings - Schedule of Borrowings (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016 | Jun. 13, 2016
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total borrowings | $ 879,803 | $ 1,020,873 |
Less current portion | 347 | 1,046 |
Less deferred debt issuance costs | 3,602 | 4,399 |
Less unaccreted debt discount | 1,001 | 1,193 |
Total long-term borrowings | $ 874,853 | 1,014,235 |
4.5% Senior Notes, due December 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.50% |  |
4.2% Senior Notes, due December 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.20% |  |
3.2% Senior Notes, due June 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 3.20% |  |
3.37% Senior Notes, due June 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 3.37% |  |
Revolving Facility |  |  |
Debt Instrument [Line Items] |  |  |
Revolving Facility | $ 29,415 | 169,579 |
Senior Notes | 4.5% Senior Notes, due December 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Total borrowings | 300,000 | 300,000 |
Senior Notes | 4.2% Senior Notes, due December 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Total borrowings | 350,000 | 350,000 |
Senior Notes | 3.2% Senior Notes, due June 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Total borrowings | 100,000 | 100,000 |
Stated interest rate |  |  | 3.20%
Senior Notes | 3.37% Senior Notes, due June 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Total borrowings | 100,000 | 100,000 |
Stated interest rate |  |  | 3.37%
Other borrowings |  |  |
Debt Instrument [Line Items] |  |  |
Other borrowings | $ 388 | $ 1,294 |

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