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Indebtedness (Narrative) (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 28, 2016 | Apr. 15, 2016 | Sep. 30, 2017 | Oct. 23, 2017 | Nov. 21, 2014
Line of Credit Facility |  |  |  |  |
Pledged Assets, Net Book Value |  |  | $ 1,569,527 |  |
Unused borrowing capacity |  |  | $ 547,746 |  |
Foreign line of credit |  |  |  |  |
Line of Credit Facility |  |  |  |  |
Interest rate on other revolving credit facilities |  |  | 0.92% |  |
U.S. revolving credit facility |  |  |  |  |
Line of Credit Facility |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | $ 1,100,000 |  |  |  |
Expansion option to increase credit facility | $ 200,000 |  |  |  |
Debt, Weighted Average Interest Rate |  |  | 2.62% |  |
Applicable margin in interest rate of revolving credit facility, basis points |  |  | 1.38% |  |
Unused borrowing capacity |  |  | $ 535,182 |  |
Senior Notes |  |  |  |  |
Line of Credit Facility |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 300,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 5.25%
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  | 5.73%
Securitization program |  |  |  |  |
Line of Credit Facility |  |  |  |  |
Interest rate on other revolving credit facilities |  |  | 2.11% |  |
Percentage of borrowing capacity on the Securitization Program |  | 80.00% |  |  |
Percentage of borrowing base on the Securitization Program |  | 100.00% |  |  |
Minimum borrowing requirement for the Securitization Program |  |  | $ 96,000 |  |
Securitization program | Subsequent Event |  |  |  |  |
Line of Credit Facility |  |  |  |  |
Maximum credit facility amount that can borrow |  |  |  | $ 130,000 |
Senior debt |  |  |  |  |
Line of Credit Facility |  |  |  |  |
2018 |  |  | 295 |  |
2019 |  |  | 11 |  |
2020 |  |  | 120,000 |  |
2021 |  |  | 540,110 |  |
2022 |  |  | 0 |  |
Thereafter |  |  | $ 300,000 |  |

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