Consolidated Balance Sheet - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current Assets
Cash and cash equivalents	$ 152,195	$ 140,095
Trade receivables, less allowance for doubtful accounts of $4,860 and $5,369	255,082	245,032
Inventories (Note 3)	185,027	156,602
Investments, short-term (Note 18)	49,892	55,106
Prepaid income taxes	13,072	10,769
Notes receivable, insurance companies (Note 19)	3,676	3,555
Prepaid expenses and other current assets	34,419	45,464
Total current assets	693,363	656,623
Property, plant and equipment, net (Note 4)	167,038	157,940
Operating lease assets, net (Note 16)	51,675	0
Prepaid pension cost (Note 14)	75,066	57,568
Deferred tax assets (Note 9)	32,596	32,522
Goodwill (Note 12)	436,679	413,640
Intangible assets, net (Note 12)	171,326	169,515
Notes receivable, insurance companies, noncurrent (Note 19)	52,336	56,012
Insurance receivable (Note 19) and other noncurrent assets	59,614	64,192
Total assets	1,739,693	1,608,012
Current Liabilities
Notes payable and current portion of long-term debt (Note 11)	20,000	20,063
Accounts payable	89,120	78,367
Employees’ compensation	41,882	51,386
Insurance and product liability (Note 19)	25,870	48,688
Income taxes payable (Note 9)	6,739	0
Warranty reserve (Note 19) and other current liabilities	93,898	83,556
Total current liabilities	277,509	282,060
Long-term debt, net (Note 11)	328,394	341,311
Pensions and other employee benefits (Note 14)	186,697	166,101
Noncurrent operating lease liabilities (Note 16)	42,632	0
Deferred tax liabilities (Note 9)	9,787	7,164
Product liability (Note 19) and other noncurrent liabilities	162,101	171,857
Total liabilities	1,007,120	968,493
Commitments and contingencies (Note 19)
Mine Safety Appliances Company shareholders' equity:
Preferred stock, 4 1/2% cumulative, $50 par value (Note 6)	3,569	3,569
Common stock, no par value (180,000,000 shares authorized; 62,081,391 shares issued; 38,841,194 and 38,526,523 shares outstanding at December 31, 2019 and 2018, respectively)	229,127	211,806
Treasury shares, at cost (Note 6)	(305,159)	(298,143)
Accumulated other comprehensive loss (Note 5)	(214,003)	(218,927)
Retained earnings	1,012,266	935,577
Total MSA Safety Incorporated shareholders’ equity	725,800	633,882
Noncontrolling interests	6,773	5,637
Total shareholders’ equity	732,573	639,519
Total liabilities and shareholders’ equity	$ 1,739,693	$ 1,608,012