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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
CURRENT ASSETS    
Cash and cash equivalents $ 362,619 $ 303,954
Short-term investments 59,967 65,408
Accounts receivable, less allowances (2021 - $7,396; 2020 - $7,851) 360,498 320,870
Other accounts receivable, less allowances (2021 - $667; 2020 - $660) 13,284 14,343
Prepaid expenses 36,355 37,774
Prepaid and refundable income taxes 5,871 11,397
Other 4,937 4,422
TOTAL CURRENT ASSETS 843,531 758,168
PROPERTY, PLANT AND EQUIPMENT    
Land and structures 345,829 342,178
Revenue equipment 933,264 916,760
Service, office, and other equipment 239,462 233,810
Software 170,528 163,193
Leasehold improvements 15,835 15,156
TOTAL PROPERTY, PLANT AND EQUIPMENT, Gross 1,704,918 1,671,097
Less allowances for depreciation and amortization 1,038,974 992,407
PROPERTY, PLANT AND EQUIPMENT, net 665,944 678,690
GOODWILL 86,368 88,320
INTANGIBLE ASSETS, net 53,084 54,981
OPERATING RIGHT-OF-USE ASSETS 109,860 115,195
DEFERRED INCOME TAXES 6,419 6,158
OTHER LONG-TERM ASSETS 76,267 77,496
TOTAL ASSETS 1,841,473 1,779,008
CURRENT LIABILITIES    
Accounts payable 204,124 170,898
Income taxes payable 7,357 316
Accrued expenses 260,185 246,746
Current portion of long-term debt 66,644 67,105
Current portion of operating lease liabilities 21,950 21,482
TOTAL CURRENT LIABILITIES 560,260 506,547
LONG-TERM DEBT, less current portion 171,075 217,119
OPERATING LEASE LIABILITIES, less current portion 92,811 97,839
POSTRETIREMENT LIABILITIES, less current portion 18,514 18,555
OTHER LONG-TERM LIABILITIES 35,722 37,948
DEFERRED INCOME TAXES 64,957 72,407
STOCKHOLDERS' EQUITY    
Common stock, $0.01 par value, authorized 70,000,000 shares; issued 2021: 29,317,699 shares, 2020: 29,045,309 shares 293 290
Additional paid-in capital 338,263 342,354
Retained earnings 676,179 595,932
Treasury stock, at cost, 2021: 3,783,227 shares; 2020: 3,656,938 shares (119,273) (111,173)
Accumulated other comprehensive income 2,672 1,190
TOTAL STOCKHOLDERS' EQUITY 898,134 828,593
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 1,841,473 $ 1,779,008