Leases (Assets and Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Right-of-Use Assets
Operating	$ 157,568	$ 143,436
Finance, net of accumulated amortization of $498 and $352 at December 31, 2020 and 2019, respectively	496	380
Total Assets	158,064	143,816
Lease Liabilities
Operating, current	28,121	34,462
Current portion of financing liabilities	250	234
Operating lease, noncurrent	129,273	111,184
Financing liabilities, net	256	146
Total Liabilities	157,900	146,026
Accumulated amortization, finance lease	$ 498	$ 352
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent