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Condensed Statements of Changes in Partners’ Capital - USD ($)
$ in Thousands
Total
AB Holding Units held by AB to fund long-term incentive compensation plans
Accumulated Other Comprehensive (Loss)
General Partner’s Capital
Limited Partners’ Capital
Balance, beginning of period at Dec. 31, 2023   $ (30,185) $ (42,044) $ 1,327 $ 2,147,147
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income $ 190,745     166 190,579
Cash distributions to Unitholders       (150) (172,561)
Retirement of AB Holding Units         (22,414)
Issuance of AB Holding Units to fund long-term incentive compensation plan awards         20,117
Change in AB Holding Units held by AB to fund long-term incentive compensation plans (net purchases)   (6,461)      
Foreign currency translation adjustment, net of tax (678)   (678)    
Changes in employee benefit related items, net of tax 211   211    
Balance, end of period at Jun. 30, 2024 2,085,054 (36,646) (42,511) 1,343 2,162,868
Balance, beginning of period at Mar. 31, 2024   (38,038) (46,203) 1,317 2,151,296
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 113,523     99 113,424
Cash distributions to Unitholders       (73) (84,072)
Retirement of AB Holding Units         (21,883)
Issuance of AB Holding Units to fund long-term incentive compensation plan awards         4,103
Change in AB Holding Units held by AB to fund long-term incentive compensation plans (net reissuances)   1,392      
Foreign currency translation adjustment, net of tax 3,487   3,487    
Changes in employee benefit related items, net of tax 205   205    
Balance, end of period at Jun. 30, 2024 2,085,054 (36,646) (42,511) 1,343 2,162,868
Balance, beginning of period at Dec. 31, 2024 2,031,862 (23,363) (41,424) 1,401 2,095,248
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 144,282     130 144,152
Cash distributions to Unitholders       (185) (205,044)
Retirement of AB Holding Units (39,388)       (39,388)
Issuance of AB Holding Units to fund long-term incentive compensation plan awards 39,565       39,565
Change in AB Holding Units held by AB to fund long-term incentive compensation plans (net purchases)   (12,019)      
Foreign currency translation adjustment, net of tax 13,798   13,798    
Changes in employee benefit related items, net of tax 8,752   8,752    
Balance, end of period at Jun. 30, 2025 1,981,623 (35,382) (18,874) 1,346 2,034,533
Balance, beginning of period at Mar. 31, 2025   (34,696) (28,653) 1,362 2,058,858
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 70,248     63 70,185
Cash distributions to Unitholders       (79) (88,786)
Retirement of AB Holding Units         (13,118)
Issuance of AB Holding Units to fund long-term incentive compensation plan awards         7,394
Change in AB Holding Units held by AB to fund long-term incentive compensation plans (net purchases)   (686)      
Foreign currency translation adjustment, net of tax 9,779   9,779    
Changes in employee benefit related items, net of tax 0   0    
Balance, end of period at Jun. 30, 2025 $ 1,981,623 $ (35,382) $ (18,874) $ 1,346 $ 2,034,533