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Loans - Credit risk profile by risk grade of non acquired 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
Non-acquired loans |  |
Loans |  |
Total loans | 9,252,831 | 8,310,613
Non-acquired loans | Pass |  |
Loans |  |
Total loans | 9,123,097 | 8,190,887
Non-acquired loans | Special mention |  |
Loans |  |
Total loans | 83,830 | 66,373
Non-acquired loans | Substandard |  |
Loans |  |
Total loans | 45,904 | 53,353
Non-acquired loans | Other income producing property |  |
Loans |  |
Total loans | 218,617 | 214,235
Non-acquired loans | Other income producing property | Pass |  |
Loans |  |
Total loans | 213,291 | 208,345
Non-acquired loans | Other income producing property | Special mention |  |
Loans |  |
Total loans | 3,966 | 4,250
Non-acquired loans | Other income producing property | Substandard |  |
Loans |  |
Total loans | 1,360 | 1,640
Non-acquired loans | Commercial loans |  |
Loans |  |
Total loans | 6,062,991 | 5,313,632
Non-acquired loans | Commercial loans | Pass |  |
Loans |  |
Total loans | 5,971,069 | 5,236,143
Non-acquired loans | Commercial loans | Special mention |  |
Loans |  |
Total loans | 69,268 | 48,222
Non-acquired loans | Commercial loans | Substandard |  |
Loans |  |
Total loans | 22,654 | 29,267
Non-acquired loans | Commercial loans | Construction and land development |  |
Loans |  |
Total loans | 968,360 | 810,551
Non-acquired loans | Commercial loans | Construction and land development | Pass |  |
Loans |  |
Total loans | 959,206 | 801,949
Non-acquired loans | Commercial loans | Construction and land development | Special mention |  |
Loans |  |
Total loans | 7,095 | 5,303
Non-acquired loans | Commercial loans | Construction and land development | Substandard |  |
Loans |  |
Total loans | 2,059 | 3,299
Non-acquired loans | Commercial loans | Commercial non-owner occupied |  |
Loans |  |
Total loans | 1,811,138 | 1,615,416
Non-acquired loans | Commercial loans | Commercial non-owner occupied | Pass |  |
Loans |  |
Total loans | 1,787,306 | 1,607,034
Non-acquired loans | Commercial loans | Commercial non-owner occupied | Special mention |  |
Loans |  |
Total loans | 22,410 | 7,372
Non-acquired loans | Commercial loans | Commercial non-owner occupied | Substandard |  |
Loans |  |
Total loans | 1,422 | 1,010
Non-acquired loans | Commercial loans | Commercial owner occupied real estate loan |  |
Loans |  |
Total loans | 1,784,017 | 1,601,360
Non-acquired loans | Commercial loans | Commercial owner occupied real estate loan | Pass |  |
Loans |  |
Total loans | 1,754,801 | 1,564,083
Non-acquired loans | Commercial loans | Commercial owner occupied real estate loan | Special mention |  |
Loans |  |
Total loans | 19,742 | 24,241
Non-acquired loans | Commercial loans | Commercial owner occupied real estate loan | Substandard |  |
Loans |  |
Total loans | 9,474 | 13,036
Non-acquired loans | Commercial loans | Commercial and industrial |  |
Loans |  |
Total loans | 1,280,859 | 1,072,070
Non-acquired loans | Commercial loans | Commercial and industrial | Pass |  |
Loans |  |
Total loans | 1,256,465 | 1,054,732
Non-acquired loans | Commercial loans | Commercial and industrial | Special mention |  |
Loans |  |
Total loans | 16,055 | 7,056
Non-acquired loans | Commercial loans | Commercial and industrial | Substandard |  |
Loans |  |
Total loans | 8,339 | 10,282
Non-acquired loans | Commercial loans | Other loans |  |
Loans |  |
Total loans | 13,892 | 18,224
Non-acquired loans | Consumer |  |
Loans |  |
Total loans | 3,189,840 | 2,996,981
Non-acquired loans | Consumer | Pass |  |
Loans |  |
Total loans | 3,152,028 | 2,954,744
Non-acquired loans | Consumer | Special mention |  |
Loans |  |
Total loans | 14,562 | 18,151
Non-acquired loans | Consumer | Substandard |  |
Loans |  |
Total loans | 23,250 | 24,086
Non-acquired loans | Consumer | Consumer Owner Occupied Loans |  |
Loans |  |
Total loans | 2,118,839 | 2,005,314
Non-acquired loans | Consumer | Consumer Owner Occupied Loans | Pass |  |
Loans |  |
Total loans | 2,094,080 | 1,978,122
Non-acquired loans | Consumer | Consumer Owner Occupied Loans | Special mention |  |
Loans |  |
Total loans | 9,585 | 10,769
Non-acquired loans | Consumer | Consumer Owner Occupied Loans | Substandard |  |
Loans |  |
Total loans | 15,174 | 16,423
Non-acquired loans | Consumer | Home equity loans |  |
Loans |  |
Total loans | 518,628 | 508,326
Non-acquired loans | Consumer | Home equity loans | Pass |  |
Loans |  |
Total loans | 508,054 | 495,127
Non-acquired loans | Consumer | Home equity loans | Special mention |  |
Loans |  |
Total loans | 4,490 | 6,915
Non-acquired loans | Consumer | Home equity loans | Substandard |  |
Loans |  |
Total loans | 6,084 | 6,284
Non-acquired loans | Consumer | Consumer |  |
Loans |  |
Total loans | 538,481 | 465,117
Non-acquired loans | Consumer | Consumer | Pass |  |
Loans |  |
Total loans | 536,002 | 463,271
Non-acquired loans | Consumer | Consumer | Special mention |  |
Loans |  |
Total loans | 487 | 467
Non-acquired loans | Consumer | Consumer | Substandard |  |
Loans |  |
Total loans | 1,992 | 1,379
Non-acquired loans | Consumer | Other loans |  |
Loans |  |
Total loans | 13,892 | 18,224
Non-acquired loans | Consumer | Other loans | Pass |  |
Loans |  |
Total loans | $ 13,892 | $ 18,224

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