Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 170,901	$ 281,200
Accounts receivable, net of allowances for bad debts and book returns of $8.2 million and $8.4 million, respectively	92,477	88,830
Inventories	175,790	145,553
Prepaid expenses and other assets	25,105	19,276
Assets held for sale	140,971	160,053
Total current assets	605,244	694,912
Property, plant, and equipment, net	86,248	88,801
Pre-publication costs, net	191,232	202,820
Royalty advances to authors, net	2,064	2,425
Goodwill	437,977	437,977
Other intangible assets, net	391,412	402,484
Operating lease assets	123,565	126,850
Deferred income taxes	2,415	2,415
Deferred commissions	30,319	30,659
Other assets	29,991	31,783
Total assets	1,900,467	2,021,126
Current liabilities
Current portion of long-term debt	19,000	19,000
Accounts payable	47,336	38,751
Royalties payable	21,503	34,765
Salaries, wages, and commissions payable	14,460	21,723
Deferred revenue	320,988	342,605
Interest payable	4,136	11,017
Severance and other charges	11,434	19,590
Accrued pension benefits	1,593	1,593
Accrued postretirement benefits	1,555	1,555
Operating lease liabilities	9,948	9,669
Other liabilities	23,468	22,912
Liabilities held for sale	32,505	30,662
Total current liabilities	507,926	553,842
Long-term debt, net of discount and issuance costs	621,319	624,692
Operating lease liabilities	129,269	132,014
Long-term deferred revenue	542,065	562,679
Accrued pension benefits	17,240	24,061
Accrued postretirement benefits	15,605	16,566
Deferred income taxes	18,503	16,411
Other liabilities	152	398
Total liabilities	1,852,079	1,930,663
Commitments and contingencies (Note 14)
Stockholders’ equity
Preferred stock, $0.01 par value: 20,000,000 shares authorized; no shares issued and outstanding at March 31, 2021 and December 31, 2020
Common stock, $0.01 par value: 380,000,000 shares authorized; 151,987,387 and 150,459,034 shares issued at March 31, 2021 and December 31, 2020, respectively; 127,410,353 and 125,882,000 shares outstanding at March 31, 2021 and December 31, 2020, respectively	1,520	1,505
Treasury stock, 24,577,034 shares as of March 31, 2021 and December 31, 2020, respectively, at cost	(518,030)	(518,030)
Capital in excess of par value	4,921,845	4,918,542
Accumulated deficit	(4,307,813)	(4,255,830)
Accumulated other comprehensive loss	(49,134)	(55,724)
Total stockholders’ equity	48,388	90,463
Total liabilities and stockholders’ equity	$ 1,900,467	$ 2,021,126