Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 185,740	$ 202,498
Accounts receivable, net	182,238	215,486
Inventories, net	124,432	162,087
Prepaid expenses and other current assets	16,155	17,966
Income tax deposits	475	2,200
Total current assets	509,040	600,237
Property, plant and mine development, net	1,517,587	1,826,303
Operating lease right-of-use assets	53,098
Goodwill	273,524	261,340
Intangible assets, net	183,815	194,626
Other assets	16,170	18,334
Total assets	2,553,234	2,900,840
Current Liabilities:
Accounts payable and accrued expenses	248,237	216,400
Current portion of operating lease liabilities	53,587
Current portion of long-term debt	18,463	13,327
Current portion of deferred revenue	15,111	31,612
Total current liabilities	335,398	261,339
Long-term debt, net	1,213,985	1,246,428
Deferred revenue	35,523	81,707
Liability for pension and other post-retirement benefits	58,453	57,194
Deferred income taxes, net	38,585	137,239
Operating lease liabilities	117,964
Other long-term obligations	36,746	64,629
Total liabilities	1,836,654	1,848,536
Commitments and Contingencies (Note Q)
Stockholders’ Equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized; zero issued and outstanding at December 31, 2019 and 2018	0	0
Common stock, $0.01 par value, 500,000,000 shares authorized; 82,601,926 issued and 73,601,950 outstanding at December 31, 2019; 81,811,977 issued and 73,148,853 outstanding at December 31, 2018	823	818
Additional paid-in capital	1,185,116	1,169,383
Retained (deficit) earnings	(279,956)	67,854
Treasury stock, at cost, 8,999,976 and 8,663,124 shares at December 31, 2019 and 2018, respectively	(180,912)	(178,215)
Accumulated other comprehensive loss	(19,854)	(15,020)
Total U.S. Silica Holdings, Inc. stockholders’ equity	705,217	1,044,820
Non-controlling interest	11,363	7,484
Total stockholders' equity	716,580	1,052,304
Total liabilities and stockholders’ equity	$ 2,553,234	$ 2,900,840