CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 21,755	$ 19,488
Accounts receivable, less allowances for discounts and expected credit losses of $6,170 and $5,822 in 2021 and 2020, respectively	180,604	198,039
Inventories	468,755	345,502
Unreturned customer inventories	22,268	19,632
Prepaid expenses and other current assets	17,823	15,875
Total current assets	711,205	598,536
Property, plant and equipment, net	102,786	89,105
Operating lease right-of-use assets	40,469	29,958
Goodwill	131,652	77,837
Other intangibles, net	106,234	54,004
Deferred incomes taxes	36,126	44,770
Investments in unconsolidated affiliates	44,087	40,507
Other assets	25,402	21,823
Total assets	1,197,961	956,540
CURRENT LIABILITIES:
Notes payable	125,298	10,000
Current portion of other debt	3,117	135
Accounts payable	137,167	100,018
Sundry payables and accrued expenses	57,182	47,078
Accrued customer returns	42,412	40,982
Accrued core liability	23,663	22,014
Accrued rebates	42,472	46,437
Payroll and commissions	45,058	35,938
Total current liabilities	476,369	302,602
Long-term debt	21	97
Noncurrent operating lease liabilities	31,206	22,450
Other accrued liabilities	25,040	25,929
Accrued asbestos liabilities	52,698	55,226
Total liabilities	585,334	406,304
Commitments and contingencies
Stockholders' equity:
Common Stock - par value $2.00 per share: Authorized 30,000,000 shares, issued 23,936,036 shares	47,872	47,872
Capital in excess of par value	105,377	105,084
Retained earnings	532,319	463,612
Accumulated other comprehensive income	(8,169)	(5,676)
Treasury stock - at cost (1,911,792 shares and 1,586,923 shares in 2021 and 2020, respectively)	(75,819)	(60,656)
Total SMP stockholders' equity	601,580	550,236
Noncontrolling Interest	11,047	0
Total Stockholders' Equity	612,627	550,236
Total liabilities and stockholders' equity	$ 1,197,961	$ 956,540