Leases - Supplemental lease information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 62,779
Operating cash flows from finance leases	54
Financing cash flows from finance leases	1,237
Right-of-use assets obtained in exchange for new operating lease liabilities	55,946
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 0
Weighted-average remaining lease term - operating leases	6 years 11 months 12 days
Weighted-average remaining lease term - finance leases	2 years 3 months 7 days
Weighted-average discount rate - operating leases	3.39%
Weighted-average discount rate - finance leases	3.36%