Short-Term and Long-Term Debt, Including Capital Leases Schedule of maturities of long-term debt (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Long-term Debt, Fiscal Year Maturity [Abstract] | ||
| Long-term Debt, 2016 | $ 19,958 | |
| Long-term Debt, 2017 | 0 | |
| Long-term Debt, 2018 | 223,709 | |
| Long-term Debt, 2019 | 0 | |
| Long-term Debt, 2020 | 0 | |
| Long-term Debt | 243,667 | |
| Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] | ||
| Capital Lease Obligations, 2016 | 2,011 | |
| Capital Lease Obligations, 2017 | 971 | |
| Capital Lease Obligations, 2018 | 338 | |
| Capital Lease Obligations, 2019 | 290 | |
| Capital Lease Obligations, 2020 | 5 | |
| Capital Leases, Future Minimum Payments Due | 3,615 | |
| Long-term Debt and Capital Lease Obligations, Fiscal Year Maturity [Abstract] | ||
| Total, 2016 | 21,969 | |
| Total, 2017 | 971 | |
| Total, 2018 | 224,047 | |
| Total, 2019 | 290 | |
| Total, 2020 | 5 | |
| Total long-term debt and capital leases | $ 247,282 | $ 156,811 |