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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
ASSETS |  |
Cash and cash equivalents | $ 94,175 | $ 91,050
Accounts receivable, net of allowance for doubtful accounts of $5,022 in 2018 and $4,471 in 2017 | 376,815 | 377,853
Inventories | 126,504 | 114,866
Income taxes receivable | 21,258 | 40,243
Prepaid expenses | 6,382 | 8,992
Other current assets | 5,924 | 7,131
Total current assets | 631,058 | 640,135
Property, plant and equipment, less accumulated depreciation of $1,693,141 in 2018 and $1,659,311 in 2017 | 523,330 | 443,928
Goodwill | 32,150 | 32,150
Other assets | 32,110 | 31,011
Total assets | 1,218,648 | 1,147,224
LIABILITIES AND STOCKHOLDERS' EQUITY |  |
Accounts payable | 138,971 | 103,462
Accrued payroll and related expenses | 24,061 | 23,577
Accrued insurance expenses | 5,592 | 5,299
Accrued state, local and other taxes | 5,904 | 8,655
Income taxes payable | 7,566 | 3,224
Other accrued expenses | 1,302 | 1,143
Total current liabilities | 183,396 | 145,360
Long-term accrued insurance expenses | 10,816 | 10,376
Long-term pension liabilities | 30,833 | 35,635
Deferred income taxes | 44,715 | 39,437
Other long-term liabilities | 3,901 | 4,719
Total liabilities | 273,661 | 235,527
Common stock | 21,483 | 21,654
Capital in excess of par value | 0 | 0
Retained earnings | 940,308 | 906,745
Accumulated other comprehensive loss | (16,804) | (16,702)
Total stockholders' equity | 944,987 | 911,697
Total liabilities and stockholders' equity | $ 1,218,648 | $ 1,147,224

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