Leases Lease assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Right-of-use assets	$ 138,640	$ 46,600	$ 0
Other current liabilities	16,168
Operating lease liabilities	$ 123,739		$ 0
Weighted Average Remaining Lease Term	12 years 1 month 2 days
Weighted Average Discount Rate	5.30%