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Retirement And Other Benefit Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Deferred Compensation Arrangement with Individual, Postretirement Benefits |  |  |
Employer contributions to defined contribution plan | $ 3,100 | $ 2,500 | $ 1,800
Other long-term liabilities | 37,335 | 35,509 |
Accrued expenses and other current liabilities | $ 21,554 | 19,002 |
Deferred Compensation, Percentage Of Funds Invested | 60.00% |  |
Deferred Compensation |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits |  |  |
Compensation deferred by participants | $ 2,300 | 1,200 | 1,600
Amount withdrawn from the Plan by participants | 1,500 | 800 | $ 400
Other long-term liabilities | 13,400 | 11,700 |
Accrued expenses and other current liabilities | 200 | 200 |
Other Assets | $ 8,200 | $ 7,800 |

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