Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 145,610	$ 181,833
Accounts receivable, net	418,642	372,974
Inventories
Raw materials and supplies	116,491	86,148
Work-in-process and finished goods	126,318	101,616
Prepaid expenses and other current assets	60,844	50,156
Total current assets	867,905	792,727
Property, Plant and Equipment, at Cost	424,360	423,253
Less: Accumulated Depreciation	(229,919)	(219,370)
Property, Plant and Equipment, net	194,441	203,883
Right of use lease assets	36,160	38,507
Goodwill	633,449	631,212
Other intangible assets, net	1,068,795	1,081,358
Investments in associated companies	98,013	95,785
Deferred tax assets	13,392	16,566
Other non-current assets	32,664	31,796
Total assets	2,944,819	2,891,834
Current liabilities
Short-term borrowings and current portion of long-term debt	48,079	38,967
Accounts and Other Payables	219,617	198,872
Accrued compensation	33,399	43,300
Accrued restructuring	5,278	8,248
Other accrued liabilities	94,061	93,573
Total current liabilities	400,434	382,960
Long-term debt	847,154	849,068
Long-term lease liabilities	25,668	27,070
Deferred tax liabilities	181,264	192,763
Other non-current liabilities	114,898	119,059
Total liabilities	1,569,418	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 -17,878,137 shares; 2020 - 17,850,616 shares	17,878	17,851
Capital in excess of par value	910,862	905,171
Retained earnings	482,001	423,940
Accumulated other comprehensive loss	(35,943)	(26,598)
Total Quaker shareholders' equity	1,374,798	1,320,364
Noncontrolling interest	603	550
Total equity	1,375,401	1,320,914
Total liabilities and equity	$ 2,944,819	$ 2,891,834