Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 79,701	$ 8,493
Accounts receivable, net	158,184	233,487
Inventories, net	180,497	221,342
Prepaid expenses and other current assets	14,921	20,107
Total current assets	433,303	483,429
Property, plant, and equipment, net	390,962	459,724
Operating lease assets, net	36,902	43,616
Goodwill, net	76,051	482,306
Other intangible assets, net	211,804	230,091
Other noncurrent assets	31,764	28,701
Total assets	1,180,786	1,727,867
Current liabilities:
Current portion of long-term debt	25,620	25,617
Accounts payable	36,666	78,368
Accrued liabilities	49,755	48,840
Current operating lease liabilities	7,942	8,311
Income taxes payable	3,501	4,174
Deferred revenue	48,851	17,761
Total current liabilities	172,335	183,071
Long-term debt	163,526	222,552
Long-term operating lease liabilities	30,459	35,777
Deferred income taxes	26,643	38,079
Other noncurrent liabilities	23,485	24,421
Total liabilities	416,448	503,900
Stockholders' equity:
Common stock, $.01 par value, 200,000,000 shares authorized, 73,301,564 shares and 72,546,321 shares issued, respectively	733	726
Additional paid-in capital	1,119,860	1,114,521
Retained earnings	348,074	797,710
Accumulated other comprehensive loss	(80,410)	(67,746)
Treasury stock, at cost, 12,270,511 and 12,045,065 shares, respectively	(623,919)	(621,244)
Total stockholders' equity	764,338	1,223,967
Total liabilities and stockholders' equity	$ 1,180,786	$ 1,727,867