Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 53,819	$ 8,493
Accounts receivable, net	168,778	233,487
Inventories, net	198,276	221,342
Income taxes receivable	44,986	2,568
Prepaid expenses and other current assets	12,533	17,539
Total current assets	478,392	483,429
Property, plant, and equipment, net	409,148	459,724
Operating lease assets, net	38,297	43,616
Goodwill, net	75,746	482,306
Other intangible assets, net	217,854	230,091
Other noncurrent assets	27,446	28,701
Total assets	1,246,883	1,727,867
Current liabilities:
Current portion of long-term debt	25,626	25,617
Accounts payable	52,160	78,368
Accrued liabilities	40,823	48,840
Current operating lease liabilities	8,091	8,311
Income taxes payable	3,606	4,174
Deferred revenue	23,583	17,761
Total current liabilities	153,889	183,071
Long-term debt	229,490	222,552
Long-term operating lease liabilities	31,502	35,777
Deferred income taxes	31,796	38,079
Other noncurrent liabilities	21,337	24,421
Total liabilities	468,014	503,900
Stockholders' equity:
Common stock, $.01 par value, 200,000,000 shares authorized, 73,300,443 shares and 72,546,321 shares issued, respectively	733	726
Additional paid-in capital	1,117,771	1,114,521
Retained earnings	368,043	797,710
Accumulated other comprehensive loss	(83,767)	(67,746)
Treasury stock, at cost, 12,268,691 and 12,045,065 shares, respectively	(623,911)	(621,244)
Total stockholders' equity	778,869	1,223,967
Total liabilities and stockholders' equity	$ 1,246,883	$ 1,727,867