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Loans - Credit risk profile by risk grade of acquired 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
Commercial loans | Commercial and industrial |  |
Loans |  |
Total loans | 1,386,327 | 1,251,719
Consumer | Real estate |  |
Loans |  |
Total loans | 3,464,980 | 3,523,157
Consumer | Consumer |  |
Loans |  |
Total loans | 663,422 | 610,231
Acquired credit impaired loans |  |
Loans |  |
Total loans | 361,846 | 456,772
Acquired credit impaired loans | Pass |  |
Loans |  |
Total loans | 218,364 | 274,474
Acquired credit impaired loans | Special mention |  |
Loans |  |
Total loans | 58,281 | 71,026
Acquired credit impaired loans | Substandard |  |
Loans |  |
Total loans | 85,201 | 111,272
Acquired credit impaired loans | Commercial loans | Real estate |  |
Loans |  |
Total loans | 130,938 | 173,707
Acquired credit impaired loans | Commercial loans | Real estate | Pass |  |
Loans |  |
Total loans | 108,762 | 140,785
Acquired credit impaired loans | Commercial loans | Real estate | Special mention |  |
Loans |  |
Total loans | 6,465 | 13,025
Acquired credit impaired loans | Commercial loans | Real estate | Substandard |  |
Loans |  |
Total loans | 15,711 | 19,897
Acquired credit impaired loans | Commercial loans | Construction and land development |  |
Loans |  |
Total loans | 25,032 | 32,257
Acquired credit impaired loans | Commercial loans | Construction and land development | Pass |  |
Loans |  |
Total loans | 17,756 | 20,950
Acquired credit impaired loans | Commercial loans | Construction and land development | Special mention |  |
Loans |  |
Total loans | 2,904 | 3,500
Acquired credit impaired loans | Commercial loans | Construction and land development | Substandard |  |
Loans |  |
Total loans | 4,372 | 7,807
Acquired credit impaired loans | Commercial loans | Commercial and industrial |  |
Loans |  |
Total loans | 7,029 | 10,925
Acquired credit impaired loans | Commercial loans | Commercial and industrial | Pass |  |
Loans |  |
Total loans | 5,160 | 6,802
Acquired credit impaired loans | Commercial loans | Commercial and industrial | Special mention |  |
Loans |  |
Total loans | 286 | 530
Acquired credit impaired loans | Commercial loans | Commercial and industrial | Substandard |  |
Loans |  |
Total loans | 1,583 | 3,593
Acquired credit impaired loans | Consumer | Real estate |  |
Loans |  |
Total loans | 163,359 | 199,701
Acquired credit impaired loans | Consumer | Real estate | Pass |  |
Loans |  |
Total loans | 82,203 | 100,803
Acquired credit impaired loans | Consumer | Real estate | Special mention |  |
Loans |  |
Total loans | 35,968 | 40,036
Acquired credit impaired loans | Consumer | Real estate | Substandard |  |
Loans |  |
Total loans | 45,188 | 58,862
Acquired credit impaired loans | Consumer | Consumer |  |
Loans |  |
Total loans | 35,488 | 40,182
Acquired credit impaired loans | Consumer | Consumer | Pass |  |
Loans |  |
Total loans | 4,483 | 5,134
Acquired credit impaired loans | Consumer | Consumer | Special mention |  |
Loans |  |
Total loans | 12,658 | 13,935
Acquired credit impaired loans | Consumer | Consumer | Substandard |  |
Loans |  |
Total loans | $ 18,347 | $ 21,113

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 + Details
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