XML 31 R57.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Leases - Additional Information (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
May 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Jan. 01, 2019
Leases [Abstract]          
Lease expiration date 2031-06        
Lease escalate percentage per year 2.50%        
Operating lease assets       $ 16,900 $ 18,200
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]       us-gaap:InvestmentsAndOtherNoncurrentAssets  
Operating lease liabilities       $ 33,573 $ 35,000
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]       us-gaap:OtherAccruedLiabilitiesCurrent  
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]       us-gaap:OtherLiabilitiesNoncurrent  
Rent expense   $ 8,200 $ 7,300