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Leasing Leasing (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Jan. 01, 2019
Leases [Abstract]    
Operating Lease, Right-of-Use Asset   $ 137,000
Lease, Cost [Abstract]    
Operating lease cost recognized as occupancy and equipment expense $ 6,419  
Operating cash flows from operating leases $ 5,914  
Weighted-average remaining lease term 10 years 1 month 6 days  
Weighted-average discount rate operating leases 3.50%  
Short-term Lease, Cost $ 2,400  
Finance Lease Liabilities, Payments, Rolling Maturity [Abstract]    
Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months 30,200  
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two 28,400  
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three 25,100  
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four 17,700  
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five 15,300  
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five $ 97,600