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Segment Reporting (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Segment Income Statement Data Abstract |  |  |  |
Net interest income | $ 226,362 | $ 183,819 | $ 436,233 | $ 364,093
Noninterest income | 92,842 | 82,410 | 183,222 | 162,241
Total revenue | 319,204 | 266,229 | 619,455 | 526,334
Credit provision | 4,000 | 12,000 | 4,000 | 21,000
Noninterest expense | 211,258 | 176,316 | 424,223 | 350,007
Income (loss) before income taxes | 103,947 | 77,913 | 191,232 | 155,327
Income tax expense (benefit) | 14,754 | 19,930 | 32,583 | 41,074
Net income | $ 89,192 | $ 57,983 | $ 158,648 | $ 114,253
Return on average allocated capital (ROCET1) | 14.00% | 10.60% | 12.70% | 10.60%
Segment Balance Sheet Data |  |  |  |
Average earning assets | $ 30,412,705 | $ 26,744,555 | $ 29,850,541 | $ 26,543,054
Average loans | 23,005,428 | 20,521,990 | 22,544,539 | 20,298,599
Average deposits | 23,646,250 | 21,523,149 | 23,648,560 | 21,494,594
Average allocated capital (CET1) | 2,488,501 | 2,099,825 | 2,439,489 | 2,080,892
Operating Segments | Corporate and Commercial Specialty |  |  |  |
Segment Income Statement Data Abstract |  |  |  |
Net interest income | 107,330 | 89,871 | 203,287 | 179,259
Noninterest income | 14,194 | 12,497 | 26,876 | 24,490
Total revenue | 121,524 | 102,368 | 230,163 | 203,749
Credit provision | 11,126 | 11,470 | 21,723 | 23,050
Noninterest expense | 41,775 | 39,418 | 81,025 | 76,897
Income (loss) before income taxes | 68,623 | 51,480 | 127,415 | 103,802
Income tax expense (benefit) | 13,454 | 16,363 | 24,880 | 34,012
Net income | $ 55,169 | $ 35,117 | $ 102,535 | $ 69,790
Return on average allocated capital (ROCET1) | 17.90% | 12.50% | 17.20% | 12.60%
Segment Balance Sheet Data |  |  |  |
Average earning assets | $ 12,066,538 | $ 10,853,881 | $ 11,729,745 | $ 10,807,106
Average loans | 12,054,347 | 10,841,858 | 11,718,236 | 10,797,831
Average deposits | 7,621,977 | 6,447,190 | 7,838,409 | 6,433,870
Average allocated capital (CET1) | 1,236,918 | 1,125,494 | 1,204,160 | 1,120,082
Operating Segments | Community, Consumer, and Business |  |  |  |
Segment Income Statement Data Abstract |  |  |  |
Net interest income | 114,620 | 90,131 | 218,163 | 179,059
Noninterest income | 76,250 | 65,809 | 150,286 | 130,679
Total revenue | 190,870 | 155,940 | 368,449 | 309,738
Credit provision | 4,880 | 5,764 | 9,846 | 10,271
Noninterest expense | 138,553 | 125,242 | 265,700 | 241,339
Income (loss) before income taxes | 47,437 | 24,934 | 92,904 | 58,128
Income tax expense (benefit) | 9,962 | 8,727 | 19,510 | 20,345
Net income | $ 37,475 | $ 16,207 | $ 73,394 | $ 37,783
Return on average allocated capital (ROCET1) | 22.70% | 11.00% | 22.80% | 13.10%
Segment Balance Sheet Data |  |  |  |
Average earning assets | $ 10,402,680 | $ 9,510,571 | $ 10,271,021 | $ 9,321,564
Average loans | 10,399,458 | 9,508,683 | 10,267,066 | 9,319,719
Average deposits | 13,736,251 | 11,574,028 | 13,418,283 | 11,456,200
Average allocated capital (CET1) | 663,172 | 588,880 | 648,032 | 582,706
Operating Segments | Risk Management and Shared Services |  |  |  |
Segment Income Statement Data Abstract |  |  |  |
Net interest income | 4,413 | 3,817 | 14,783 | 5,775
Noninterest income | 2,399 | 4,104 | 6,059 | 7,072
Total revenue | 6,812 | 7,921 | 20,842 | 12,847
Credit provision | (12,006) | (5,234) | (27,569) | (12,321)
Noninterest expense | 30,929 | 11,656 | 77,498 | 31,771
Income (loss) before income taxes | (12,111) | 1,499 | (29,087) | (6,603)
Income tax expense (benefit) | (8,661) | (5,160) | (11,806) | (13,283)
Net income | $ (3,450) | $ 6,659 | $ (17,280) | $ 6,680
Return on average allocated capital (ROCET1) | (3.90%) | 4.50% | (7.50%) | 1.10%
Segment Balance Sheet Data |  |  |  |
Average earning assets | $ 7,943,487 | $ 6,380,103 | $ 7,849,775 | $ 6,414,384
Average loans | 551,624 | 171,449 | 559,238 | 181,049
Average deposits | 2,288,021 | 3,501,931 | 2,391,868 | 3,604,524
Average allocated capital (CET1) | $ 588,411 | $ 385,451 | $ 587,297 | $ 378,104

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