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Debt (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Short-term debt | $ 19,000 | $ 29,000 | $ 0
Long-term debt |  |  |
Total current maturities of long-term debt | 53,972 | 47,545 | 51,520
Total long-term debt, less current maturities | 371,315 | 397,065 | 395,559
Nonrecourse |  |  |
Debt Instrument [Line Items] |  |  |
Short-term debt | 0 | 0 | 0
Long-term debt |  |  |
Total current maturities of long-term debt | 0 | 0 | 0
Total long-term debt, less current maturities | 0 | 0 | 0
Recourse |  |  |
Debt Instrument [Line Items] |  |  |
Short-term debt | 19,000 | 29,000 | 0
Long-term debt |  |  |
Total current maturities of long-term debt | 53,972 | 47,545 | 51,520
Total long-term debt, less current maturities | $ 371,315 | $ 397,065 | $ 395,559

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