Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 141,393	$ 181,833
Accounts receivable, net	433,631	372,974
Inventories
Raw materials and supplies	121,951	86,148
Work-in-process and finished goods	132,943	101,616
Prepaid expenses and other current assets	63,278	50,156
Total current assets	893,196	792,727
Property, Plant and Equipment, at Cost	423,469	423,253
Less: Accumulated Depreciation	(232,636)	(219,370)
Property, Plant and Equipment, net	190,833	203,883
Right of use lease assets	34,314	38,507
Goodwill	630,669	631,212
Other intangible assets, net	1,048,688	1,081,358
Investments in associated companies	94,110	95,785
Deferred tax assets	18,409	16,566
Other non-current assets	31,608	31,796
Total assets	2,941,827	2,891,834
Current liabilities
Short-term borrowings and current portion of long-term debt	52,611	38,967
Accounts and Other Payables	219,601	198,872
Accrued compensation	40,655	43,300
Accrued restructuring	4,050	8,248
Other accrued liabilities	93,042	93,573
Total current liabilities	409,959	382,960
Long-term debt	839,275	849,068
Long-term lease liabilities	24,599	27,070
Deferred tax liabilities	174,405	192,763
Other non-current liabilities	109,893	119,059
Total liabilities	1,558,131	1,570,920
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, $1 par value; authorized 30,000,000 shares; issued and outstanding 2021 -17,888,577 shares; 2020 - 17,850,616 shares	17,889	17,851
Capital in excess of par value	914,277	905,171
Retained earnings	505,635	423,940
Accumulated other comprehensive loss	(54,723)	(26,598)
Total Quaker shareholders' equity	1,383,078	1,320,364
Noncontrolling interest	618	550
Total equity	1,383,696	1,320,914
Total liabilities and equity	$ 2,941,827	$ 2,891,834