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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2018 | Mar. 31, 2017
INTEREST INCOME |  |  |  |
Loans receivable | $ 126,529 | $ 116,034 | $ 251,040 | $ 230,869
Mortgage-backed securities | 17,667 | 16,226 | 34,566 | 29,015
Investment securities and cash equivalents | 4,883 | 3,938 | 9,253 | 9,078
Interest income | 149,079 | 136,198 | 294,859 | 268,962
INTEREST EXPENSE |  |  |  |
Customer accounts | 16,414 | 12,392 | 31,052 | 25,409
FHLB advances | 15,364 | 16,079 | 30,771 | 32,674
Interest expense | 31,778 | 28,471 | 61,823 | 58,083
Net interest income | 117,301 | 107,727 | 233,036 | 210,879
Provision (release) for loan losses | (950) | (1,600) | (950) | (1,600)
Net interest income after provision (release) for loan losses | 118,251 | 109,327 | 233,986 | 212,479
OTHER INCOME |  |  |  |
Gain on sale of investment securities | 0 | 0 | 0 | 968
FDIC loss share valuation adjustments | 0 | 0 | (8,550) | 0
Loan fee income | 780 | 1,087 | 1,815 | 2,421
Deposit fee income | 6,403 | 4,904 | 13,089 | 10,089
Other income | 5,404 | 4,145 | 13,028 | 8,554
Other income, total | 12,587 | 10,136 | 19,382 | 22,032
OTHER EXPENSE |  |  |  |
Compensation and benefits | 31,625 | 28,833 | 61,244 | 55,827
Occupancy | 9,013 | 9,091 | 17,684 | 17,541
FDIC insurance premiums | 2,852 | 2,910 | 5,672 | 5,749
Product delivery | 3,665 | 3,489 | 7,621 | 6,850
Information technology | 8,781 | 6,686 | 16,710 | 13,137
Other expense | 9,851 | 6,458 | 18,797 | 12,704
Other expense, total | 65,787 | 57,467 | 127,728 | 111,808
Gain (loss) on real estate owned, net | (278) | 795 | (232) | 1,193
Income before income taxes | 64,773 | 62,791 | 125,408 | 123,896
Income tax expense | 15,502 | 20,721 | 24,467 | 40,580
NET INCOME | $ 49,271 | $ 42,070 | $ 100,941 | $ 83,316
PER SHARE DATA |  |  |  |
Basic earnings per share (in dollars per share) | $ 0.58 | $ 0.47 | $ 1.17 | $ 0.93
Diluted earnings per share (in dollars per share) | 0.57 | 0.47 | 1.17 | 0.93
Dividends paid on common stock per share (in dollars per share) | $ 0.17 | $ 0.4 | $ 0.32 | $ 0.54
Basic weighted average number of shares outstanding (in shares) | 85,647,494 | 89,382,416 | 86,299,885 | 89,346,294
Diluted weighted average number of shares outstanding (in shares) | 85,747,167 | 89,736,320 | 86,422,077 | 89,732,042

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