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Loans - Credit risk profile by risk grade of acquired non-credit impaired loans (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Mar. 31, 2019
--- | --- | ---
Loans |  |
Total loans | $ 11,375,104 | $ 11,146,122
Construction and land development |  |
Loans |  |
Total loans | 1,017,261 | 946,503
Other income producing property |  |
Loans |  |
Total loans | 346,554 | 380,177
Consumer Owner Occupied Loans |  |
Loans |  |
Total loans | 2,706,960 | 2,731,499
Commercial loans | Commercial non-owner occupied |  |
Loans |  |
Total loans | 2,323,967 | 2,329,449
Commercial loans | Commercial owner occupied real estate loan |  |
Loans |  |
Total loans | 2,158,701 | 2,086,662
Commercial loans | Commercial and industrial |  |
Loans |  |
Total loans | 1,386,327 | 1,251,719
Commercial loans | Other loans |  |
Loans |  |
Total loans | 13,892 | 18,224
Consumer | Home equity loans |  |
Loans |  |
Total loans | 758,020 | 791,658
Consumer | Consumer |  |
Loans |  |
Total loans | 663,422 | 610,231
Acquired non-credit impaired loans |  |
Loans |  |
Total loans | 1,760,427 | 2,378,737
Acquired non-credit impaired loans | Pass |  |
Loans |  |
Total loans | 1,697,942 | 2,292,765
Acquired non-credit impaired loans | Special mention |  |
Loans |  |
Total loans | 39,772 | 59,811
Acquired non-credit impaired loans | Substandard |  |
Loans |  |
Total loans | 22,713 | 26,161
Acquired non-credit impaired loans | Other income producing property |  |
Loans |  |
Total loans | 95,697 | 120,696
Acquired non-credit impaired loans | Commercial loans |  |
Loans |  |
Total loans | 985,780 | 1,438,160
Acquired non-credit impaired loans | Commercial loans | Pass |  |
Loans |  |
Total loans | 950,062 | 1,383,572
Acquired non-credit impaired loans | Commercial loans | Special mention |  |
Loans |  |
Total loans | 27,005 | 44,197
Acquired non-credit impaired loans | Commercial loans | Substandard |  |
Loans |  |
Total loans | 8,713 | 10,391
Acquired non-credit impaired loans | Commercial loans | Construction and land development |  |
Loans |  |
Total loans | 33,569 | 113,572
Acquired non-credit impaired loans | Commercial loans | Construction and land development | Pass |  |
Loans |  |
Total loans | 31,690 | 111,414
Acquired non-credit impaired loans | Commercial loans | Construction and land development | Special mention |  |
Loans |  |
Total loans | 966 | 845
Acquired non-credit impaired loans | Commercial loans | Construction and land development | Substandard |  |
Loans |  |
Total loans | 913 | 1,313
Acquired non-credit impaired loans | Commercial loans | Commercial non-owner occupied |  |
Loans |  |
Total loans | 447,441 | 629,394
Acquired non-credit impaired loans | Commercial loans | Commercial non-owner occupied | Pass |  |
Loans |  |
Total loans | 432,710 | 615,277
Acquired non-credit impaired loans | Commercial loans | Commercial non-owner occupied | Special mention |  |
Loans |  |
Total loans | 14,162 | 13,682
Acquired non-credit impaired loans | Commercial loans | Commercial non-owner occupied | Substandard |  |
Loans |  |
Total loans | 569 | 435
Acquired non-credit impaired loans | Commercial loans | Commercial owner occupied real estate loan |  |
Loans |  |
Total loans | 307,193 | 400,658
Acquired non-credit impaired loans | Commercial loans | Commercial owner occupied real estate loan | Pass |  |
Loans |  |
Total loans | 300,678 | 380,536
Acquired non-credit impaired loans | Commercial loans | Commercial owner occupied real estate loan | Special mention |  |
Loans |  |
Total loans | 3,092 | 15,440
Acquired non-credit impaired loans | Commercial loans | Commercial owner occupied real estate loan | Substandard |  |
Loans |  |
Total loans | 3,423 | 4,682
Acquired non-credit impaired loans | Commercial loans | Commercial and industrial |  |
Loans |  |
Total loans | 101,880 | 173,840
Acquired non-credit impaired loans | Commercial loans | Commercial and industrial | Pass |  |
Loans |  |
Total loans | 97,092 | 163,298
Acquired non-credit impaired loans | Commercial loans | Commercial and industrial | Special mention |  |
Loans |  |
Total loans | 2,948 | 7,897
Acquired non-credit impaired loans | Commercial loans | Commercial and industrial | Substandard |  |
Loans |  |
Total loans | 1,840 | 2,645
Acquired non-credit impaired loans | Commercial loans | Other income producing property |  |
Loans |  |
Total loans | 95,697 | 120,696
Acquired non-credit impaired loans | Commercial loans | Other income producing property | Pass |  |
Loans |  |
Total loans | 87,892 | 113,047
Acquired non-credit impaired loans | Commercial loans | Other income producing property | Special mention |  |
Loans |  |
Total loans | 5,837 | 6,333
Acquired non-credit impaired loans | Commercial loans | Other income producing property | Substandard |  |
Loans |  |
Total loans | 1,968 | 1,316
Acquired non-credit impaired loans | Consumer |  |
Loans |  |
Total loans | 774,647 | 940,577
Acquired non-credit impaired loans | Consumer | Pass |  |
Loans |  |
Total loans | 747,880 | 909,193
Acquired non-credit impaired loans | Consumer | Special mention |  |
Loans |  |
Total loans | 12,767 | 15,614
Acquired non-credit impaired loans | Consumer | Substandard |  |
Loans |  |
Total loans | 14,000 | 15,770
Acquired non-credit impaired loans | Consumer | Consumer Owner Occupied Loans |  |
Loans |  |
Total loans | 496,431 | 610,376
Acquired non-credit impaired loans | Consumer | Consumer Owner Occupied Loans | Pass |  |
Loans |  |
Total loans | 486,433 | 597,220
Acquired non-credit impaired loans | Consumer | Consumer Owner Occupied Loans | Special mention |  |
Loans |  |
Total loans | 6,434 | 7,325
Acquired non-credit impaired loans | Consumer | Consumer Owner Occupied Loans | Substandard |  |
Loans |  |
Total loans | 3,564 | 5,831
Acquired non-credit impaired loans | Consumer | Home equity loans |  |
Loans |  |
Total loans | 188,732 | 225,278
Acquired non-credit impaired loans | Consumer | Home equity loans | Pass |  |
Loans |  |
Total loans | 174,912 | 210,066
Acquired non-credit impaired loans | Consumer | Home equity loans | Special mention |  |
Loans |  |
Total loans | 5,679 | 7,623
Acquired non-credit impaired loans | Consumer | Home equity loans | Substandard |  |
Loans |  |
Total loans | 8,141 | 7,589
Acquired non-credit impaired loans | Consumer | Consumer |  |
Loans |  |
Total loans | 89,484 | 104,923
Acquired non-credit impaired loans | Consumer | Consumer | Pass |  |
Loans |  |
Total loans | 86,535 | 101,907
Acquired non-credit impaired loans | Consumer | Consumer | Special mention |  |
Loans |  |
Total loans | 654 | 666
Acquired non-credit impaired loans | Consumer | Consumer | Substandard |  |
Loans |  |
Total loans | $ 2,295 | $ 2,350

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