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Accumulated Other Comprehensive Loss (AOCI) (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The changes in the components of AOCI for the years ended December 31, 2020, 2019 and 2018 are as follows (in thousands): 
Cumulative Foreign Currency TranslationUnrealized (Losses) Gains on Derivative InstrumentsTotal Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2017$(551,857)$— $(551,857)
Other comprehensive loss before reclassifications(362,001)— (362,001)
Other comprehensive loss(362,001)— (362,001)
Balance at December 31, 2018(913,858)— (913,858)
Other comprehensive loss before reclassifications(15,855)(68,928)(84,783)
Amounts reclassified from AOCI— 5,828 5,828 
Tax effect— 20,348 20,348 
Other comprehensive loss(15,855)(42,752)(58,607)
Balance at December 31, 2019(929,713)(42,752)(972,465)
Other comprehensive loss before reclassifications(367,249)(70,719)(437,968)
Amounts reclassified from AOCI— 39,264 39,264 
Tax effect— 8,011 8,011 
Other comprehensive loss(367,249)(23,444)(390,693)
Balance at December 31, 2020$(1,296,962)$(66,196)$(1,363,158)