CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets
Cash and cash equivalents	$ 308,517	$ 335,319
Short-term restricted cash included in prepaid expenses and other current assets	3,571	3,529
Long-term restricted cash included in other assets	6,969
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	$ 319,057	$ 338,848
Restricted Cash, Current, Asset, Statement of Financial Position	us-gaap:PrepaidExpenseAndOtherAssetsCurrent	us-gaap:PrepaidExpenseAndOtherAssetsCurrent
Restricted Cash, Noncurrent, Asset, Statement of Financial Position	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent