Commitments, Contingencies and Other Liabilities - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2017 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Jun. 30, 2017 |
|
| Commitments and Contingencies Disclosure [Abstract] | |||||
| Rent expense | $ 3,798 | $ 3,768 | $ 3,383 | ||
| Legal reserve | $ 28,000 | ||||
| Settlement amount unpaid | $ 5,000 | ||||
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of loss contingency liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of damages paid to the plaintiff in the legal matter. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|