| Leases - Supplemental Cash Flow Information (Details) $ in Thousands | 9 Months Ended | 
|---|---|
| Sep. 30, 2019  USD ($) | |
| Leases [Abstract] | |
| Cash paid for amounts included in the measurement of operating lease liabilities | $ 5,212 | 
| Right-of-use assets obtained in exchange for operating lease obligations | $ 1,076 | 
| X | ||||||||||
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- References No definition available. 
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| X | ||||||||||
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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