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v3.23.3

Accumulated Other Comprehensive Income, Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2023
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward] |  |  |
Balance attributable to SMP |  |  | $ 610,020
Other comprehensive income before reclassifications |  | $ (1,803) | 3,516
Amounts reclassified from accumulated other comprehensive income |  | (489) | (1,265)
Other comprehensive income, net |  | (2,292) | 2,251
Balance attributable to SMP |  | 629,348 | 629,348
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward] |  |  |
Unrecognized gain relating to change in fair value of cash flow interest rate hedge |  | 2,300 | 3,000
Unrecognized gain relating to change in fair value of cash flow interest rate hedge, net of tax |  | 1,700 | 2,200
Unrecognized gain, cash receipts |  | 600 | 1,700
Unrecognized gain, cash receipts, net of tax |  | 500 | 1,200
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward] |  |  |
Balance attributable to SMP |  | (7,927) | (12,470)
Balance attributable to SMP |  | (10,219) | (10,219)
Foreign Currency Translation [Member] |  |  |
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward] |  |  |
Balance attributable to SMP |  | (12,234) | (16,330)
Other comprehensive income before reclassifications |  | (3,997) | 99
Amounts reclassified from accumulated other comprehensive income |  | 0 | 0
Other comprehensive income, net |  | (3,997) | 99
Balance attributable to SMP |  | (16,231) | (16,231)
Unrecognized Postretirement Benefit Costs (Credit) [Member] |  |  |
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward] |  |  |
Balance attributable to SMP |  | 30 | 37
Other comprehensive income before reclassifications |  | 0 | 0
Amounts reclassified from accumulated other comprehensive income |  | (3) | (10)
Other comprehensive income, net |  | (3) | (10)
Balance attributable to SMP |  | 27 | 27
Unrealized Derivative Gains (Losses) [Member] |  |  |
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward] |  |  |
Balance attributable to SMP |  | 4,277 | 3,823
Other comprehensive income before reclassifications | [1] | 2,194 | 3,417
Amounts reclassified from accumulated other comprehensive income |  | (486) | (1,255)
Other comprehensive income, net |  | 1,708 | 2,162
Balance attributable to SMP |  | $ 5,985 | $ 5,985
[1] | Consists of the unrecognized gain relating to the change in fair value of the cash flow interest rate hedge of $2.3 million ($1.7 million, net of tax) and $3 million ($2.2 million, net of tax) in the three months and nine months ended September 30, 2023, respectively, plus cash receipts of $0.6 million ($0.5 million, net of tax) and $1.7 million ($1.2 million, net of tax) in the three months and nine months ended September 30, 2023, respectively.

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