v3.20.4
PARTNERS' EQUITY Table 4 - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance $ (67,896)    
Other comprehensive income (loss) (28,760) $ (13,018) $ 30,049
Ending balance (96,656) (67,896)  
Foreign Currency Translation [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (43,772) (47,299) (51,603)
Other comprehensive income (loss) before reclassifications 1,410 3,527 (13,880)
Other     60
Other comprehensive income (loss) 1,410 3,527 4,304
Ending balance (42,362) (43,772) (47,299)
Cash Flow Hedges [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (16,124) (893) (24,304)
Other comprehensive income (loss) before reclassifications (30,291) (19,045) 17,912
Net loss (gain) reclassified from AOCI     0
Other     0
Other comprehensive income (loss) (26,026) (15,231) 23,411
Ending balance (42,150) (16,124) (893)
Pension and Other Postretirement Benefits [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (8,000) (6,686) (9,020)
Other comprehensive income (loss) before reclassifications (2,924) 1,000 3,282
Net loss (gain) reclassified from AOCI     0
Other     (134)
Other comprehensive income (loss) (4,144) (1,314) 2,334
Ending balance (12,144) (8,000) (6,686)
Total [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (67,896) (54,878) (84,927)
Other comprehensive income (loss) before reclassifications (31,805) (14,518) 7,314
Other     (74)
Other comprehensive income (loss) (28,760) (13,018) 30,049
Ending balance (96,656) (67,896) (54,878)
Interest expense, net | Foreign Currency Translation [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI 0 0 0
Interest expense, net | Cash Flow Hedges [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI 4,265 3,814 5,499
Interest expense, net | Pension and Other Postretirement Benefits [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI 0 0 0
Interest expense, net | Total [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI 4,265 3,814 5,499
Pension Plan [Member] | Other Income [Member] | Foreign Currency Translation [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI 0 0 0
Pension Plan [Member] | Other Income [Member] | Cash Flow Hedges [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI 0 0 0
Pension Plan [Member] | Other Income [Member] | Pension and Other Postretirement Benefits [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI (1,220) (2,314) (814)
Pension Plan [Member] | Other Income [Member] | Total [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI $ (1,220) $ (2,314) (814)
Sale of U.K. and Amsterdam Operations [Member] | Other Income [Member] | Foreign Currency Translation [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI     18,124
Sale of U.K. and Amsterdam Operations [Member] | Other Income [Member] | Total [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net loss (gain) reclassified from AOCI     $ 18,124