XML 104 R89.htm IDEA: XBRL DOCUMENT v3.20.4
Income Taxes - Reconciliation of Unrecognized Tax Benefit (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits      
Balance at beginning of year $ 40,878 $ 41,110 $ 36,229
Additions based on tax positions related to the current year 4,398 7,708 6,231
Additions for tax positions of prior years 0 1,200 9,377
Reductions for tax positions of prior years (2,410) 0 (2,870)
Reductions for audit settlements (930) (3,205) 0
Reductions resulting from a lapse of the applicable statute of limitations periods (8,717) (5,935) (7,857)
Balance at end of year $ 33,219 $ 40,878 $ 41,110