Leases (Supplemental Balance Sheet Information) (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended
	Feb. 02, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Leases [Abstract]
Operating lease ROU assets		$ 45,965		$ 50,192
Accrued expenses		16,835		18,491
Operating lease liabilities		29,416		40,258
Total operating lease liabilities		$ 46,251		$ 58,749
Weighted average remaining lease term		10 years		9 years
Weighted average discount rate		5.33%		6.35%
Cash paid for operating leases	$ 1,575	$ 2,929	$ 7,757
ROU assets obtained in exchange for lease obligations	$ 453	$ 261	$ 1,465