XML 56 R46.htm IDEA: XBRL DOCUMENT v3.8.0.1
Schedule of Operating Lease Rental Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Rent expense        
Operating Leases, Rent Expense $ 13,144 $ 13,830 $ 39,392 $ 41,222
Space Lease Agreements [Member]        
Rent expense        
Operating Leases, Rent Expense 9,245 10,284 27,884 30,730
Related Party Leases [Member]        
Rent expense        
Operating Leases, Rent Expense 469 468 1,550 1,873
Other Operating Leases [Member]        
Rent expense        
Operating Leases, Rent Expense $ 3,430 $ 3,078 $ 9,958 $ 8,619