Leases - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Total lease expense	$ 16,238	$ 14,783	$ 13,674
Operating cash flows for operating leases	12,727	11,655	10,745
ROU asset obtained in exchange for new lease liability, operating leases	$ 5,733	$ 0	$ 0
Weighted average remaining lease term, operating leases	51 years
Weighted average discount rate, operating leases	4.36%