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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Operating revenues: |  |  |  |
Total operating revenues | $ 316,240 | $ 278,326 | $ 678,409 | $ 618,840
Operating expenses: |  |  |  |
Sales and marketing expenses | 106,811 | 87,432 | 223,549 | 186,133
Compensation and benefits expenses | 58,867 | 48,298 | 111,932 | 109,773
Processing expenses | 71,371 | 49,222 | 142,466 | 100,854
Other general and administrative expenses | 73,801 | 49,411 | 136,223 | 96,732
Total operating expenses | 310,850 | 234,363 | 614,170 | 493,492
Operating income | 5,390 | 43,963 | 64,239 | 125,348
Interest expense, net | 443 | 66 | 684 | 1,670
Other income (expense), net | 2,154 | (99) | 2,346 | 34
Income before income taxes | 7,101 | 43,798 | 65,901 | 123,712
Income tax expense | 3,807 | 9,106 | 15,762 | 24,977
Net income | $ 3,294 | $ 34,692 | $ 50,139 | $ 98,735
Basic earnings per common share (in usd per share) | $ 0.06 | $ 0.66 | $ 0.95 | $ 1.87
Diluted earnings per common share (in usd per share) | $ 0.06 | $ 0.64 | $ 0.93 | $ 1.82
Basic weighted-average common shares issued and outstanding (in shares) | 52,275 | 52,588 | 52,084 | 52,818
Diluted weighted-average common shares issued and outstanding (in shares) | 53,164 | 53,811 | 52,913 | 54,154
Card revenues and other fees |  |  |  |
Operating revenues | $ 152,681 | $ 121,613 | $ 294,075 | $ 251,190
Processing and settlement service revenues |  |  |  |
Operating revenues | 65,450 | 67,073 | 188,516 | 174,652
Interchange revenues |  |  |  |
Operating revenues | 95,970 | 81,334 | 186,836 | 173,875
Interest income, net |  |  |  |
Operating revenues | $ 2,139 | $ 8,306 | $ 8,982 | $ 19,123

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