Leases (Amounts Reported in Unaudited Condensed Consolidated Balance Sheets for Operating Leases) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease assets, net	$ 35,842	$ 21,111
Short-term operating lease liabilities (in accrued expenses)	$ 8,057	$ 7,234
Operating lease, liability, current, statement of financial position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Long-term operating lease liabilities	$ 33,977	$ 14,301
Total operating lease liabilities	$ 42,034	$ 21,535