Operating Leases Operating Lease Other Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 12,322
Operating lease assets obtained in exchange for operating lease liabilities	$ 3,818
Weighted-average remaining lease term	3 years 1 month 2 days
Weighted average discount rate, percent	3.60%