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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
OPERATING REVENUES: |  |  |
Total operating revenues | $ 2,971,963 | $ 3,221,679 | $ 3,122,592
OPERATING EXPENSES: |  |  |
Salaries, wages and benefits | 1,001,746 | 1,201,518 | 1,192,067
Depreciation and amortization | 368,098 | 334,589 | 292,768
Special items | 21,869 |  |
Other operating expenses | 243,729 | 272,826 | 250,778
Total operating expenses | 2,459,705 | 2,747,399 | 2,734,393
OPERATING INCOME | 512,258 | 474,280 | 388,199
OTHER INCOME (EXPENSE): |  |  |
Interest income | 14,131 | 8,823 | 4,509
Interest expense | (127,755) | (120,409) | (104,925)
Other, net | 47,671 | 3,620 | 400
Total other expense, net | (65,953) | (107,966) | (100,016)
INCOME BEFORE INCOME TAXES | 446,305 | 366,314 | 288,183
PROVISION (BENEFIT) FOR INCOME TAXES | 106,206 | 85,942 | (140,724)
NET INCOME | $ 340,099 | $ 280,372 | $ 428,907
BASIC EARNINGS PER SHARE (in dollars per share) | $ 6.68 | $ 5.40 | $ 8.28
DILUTED EARNINGS PER SHARE (in dollars per share) | $ 6.62 | $ 5.30 | $ 8.08
Weighted average common shares: |  |  |
Basic (in shares) | 50,932,000 | 51,914,000 | 51,804,000
Diluted (in shares) | 51,375,000 | 52,871,000 | 53,100,000
COMPREHENSIVE INCOME: |  |  |
Net income | $ 340,099 | $ 280,372 | $ 428,907
Net unrealized appreciation on marketable securities, net of taxes | 32 | 18 | 21
TOTAL COMPREHENSIVE INCOME | 340,131 | 280,390 | 428,928
Flying agreements |  |  |
OPERATING REVENUES: |  |  |
Total operating revenues | 2,889,265 | 3,169,520 | 3,078,297
Airport customer service and other |  |  |
OPERATING REVENUES: |  |  |
Total operating revenues | 82,698 | 52,159 | 44,295
Aircraft maintenance, materials and repairs |  |  |
OPERATING EXPENSES: |  |  |
Total operating expenses | 514,313 | 556,259 | 579,463
Aircraft fuel |  |  |
OPERATING EXPENSES: |  |  |
Total operating expenses | 119,115 | 117,657 | 85,136
Airport related expenses |  |  |
OPERATING EXPENSES: |  |  |
Total operating expenses | 118,837 | 109,605 | 118,374
Aircraft rentals |  |  |
OPERATING EXPENSES: |  |  |
Total operating expenses | $ 71,998 | $ 154,945 | $ 215,807

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