Leases (Amounts Reported in Unaudited and Audited Condensed Consolidated Balance Sheets for Operating Leases) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease assets, net	$ 38,325	$ 37,991
Short-term operating lease liabilities (in accrued expenses)	$ 9,498	$ 9,283
Operating lease, liability, current, statement of financial position [Extensible List]	Accrued expenses	Accrued expenses
Long-term operating lease liabilities	$ 35,623	$ 35,516
Total operating lease liabilities	$ 45,121	$ 44,799