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Business Segments (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) Segment | Jun. 30, 2016 Segment | Dec. 31, 2018 USD ($) Segment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments (segment) | Segment |  |  |  |  |  |  |  |  | 2 | 1 | 2 |  |
Effective income tax rate |  |  |  |  |  |  |  |  |  |  | 21.26% | 36.36% | 36.83%
Interest income | $ 103,303 | $ 110,045 | $ 107,639 | $ 96,964 | $ 97,619 | $ 98,285 | $ 93,852 | $ 83,094 |  |  | $ 417,951 | $ 372,850 | $ 322,539
Interest | 41,779 | 46,044 | 40,317 | 31,933 | 29,319 | 30,266 | 25,246 | 20,676 |  |  | 160,074 | 105,507 | 73,042
Net interest income | 61,524 | 64,001 | 67,322 | 65,031 | 68,300 | 68,019 | 68,606 | 62,418 |  |  | 257,877 | 267,343 | 249,497
Provision for loan losses | 1,385 | 2,924 | (784) | 2,117 | 831 | 2,352 | 535 | 3,050 |  |  | 5,642 | 6,768 | 3,041
Non-interest income (1) | 19,877 | 2,084 | 16,127 | 20,910 | 19,740 | 18,026 | 18,391 | 22,754 |  |  | 58,998 | 78,910 | 56,370
Non-interest expenses | 57,045 | 57,104 | 53,750 | 52,280 | 54,788 | 61,040 | 50,413 | 49,366 |  |  | 220,179 | 215,606 | 178,231
Income before income taxes | 22,971 | 6,057 | 30,483 | 31,544 | 32,421 | 22,653 | 36,049 | 32,756 |  |  |  |  |
Income tax expense | 5,109 | 28 | 6,820 | 7,402 | 10,806 | 14,899 | 12,327 | 7,009 |  |  | 19,359 | 45,042 | 45,893
Net income | 17,862 | 6,029 | 23,663 | 24,142 | 21,615 | 7,754 | 23,722 | 25,747 |  |  | 71,695 | 78,837 | 78,702
Preferred stock dividends | 3,615 | 3,615 | 3,615 | 3,615 | 3,615 | 3,615 | 3,615 | 3,615 |  |  | 14,459 | 14,459 | 9,515
Net income available to common shareholders | 14,247 | $ 2,414 | $ 20,048 | $ 20,527 | 18,000 | $ 4,139 | $ 20,107 | $ 22,132 |  |  | 57,236 | 64,378 | 69,187
Goodwill and other intangibles | 16,499 |  |  |  | 16,295 |  |  |  |  |  | 16,499 | 16,295 |
Total assets | 9,833,425 |  |  |  | 9,839,555 |  |  |  |  |  | 9,833,425 | 9,839,555 |
Total deposits | 7,142,236 |  |  |  | 6,800,142 |  |  |  |  |  | 7,142,236 | 6,800,142 |
Consolidated |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  |  |  | 417,951 | 372,850 | 322,539
Interest |  |  |  |  |  |  |  |  |  |  | 160,074 | 105,507 | 73,042
Net interest income |  |  |  |  |  |  |  |  |  |  | 257,877 | 267,343 | 249,497
Provision for loan losses |  |  |  |  |  |  |  |  |  |  | 5,642 | 6,768 | 3,041
Non-interest income (1) |  |  |  |  |  |  |  |  |  |  | 58,998 | 78,910 | 56,370
Non-interest expenses |  |  |  |  |  |  |  |  |  |  | 220,179 | 215,606 | 178,231
Income before income taxes |  |  |  |  |  |  |  |  |  |  | 91,054 | 123,879 | 124,595
Income tax expense |  |  |  |  |  |  |  |  |  |  | 19,359 | 45,042 | 45,893
Net income |  |  |  |  |  |  |  |  |  |  | 71,695 | 78,837 | 78,702
Preferred stock dividends |  |  |  |  |  |  |  |  |  |  | 14,459 | 14,459 | 9,515
Net income available to common shareholders |  |  |  |  |  |  |  |  |  |  | 57,236 | 64,378 | 69,187
Goodwill and other intangibles | 16,499 |  |  |  | 16,295 |  |  |  | $ 17,621 |  | 16,499 | 16,295 | 17,621
Total assets | 9,833,425 |  |  |  | 9,839,555 |  |  |  | 9,382,736 |  | 9,833,425 | 9,839,555 | 9,382,736
Total deposits | 7,142,236 |  |  |  | 6,800,142 |  |  |  | 7,303,775 |  | 7,142,236 | 6,800,142 | 7,303,775
Total non-deposit liabilities | 1,734,373 |  |  |  | 2,118,449 |  |  |  | 1,223,089 |  | $ 1,734,373 | $ 2,118,449 | $ 1,223,089
Operating Segments | Customers Bank Business Banking |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Effective income tax rate |  |  |  |  |  |  |  |  |  |  | 24.56% | 37.67% | 38.00%
Interest income |  |  |  |  |  |  |  |  |  |  | $ 400,948 | $ 359,931 | $ 315,643
Interest |  |  |  |  |  |  |  |  |  |  | 159,674 | 105,438 | 73,004
Net interest income |  |  |  |  |  |  |  |  |  |  | 241,274 | 254,493 | 242,639
Provision for loan losses |  |  |  |  |  |  |  |  |  |  | 2,928 | 5,638 | 2,246
Non-interest income (1) |  |  |  |  |  |  |  |  |  |  | 17,499 | 24,788 | 23,165
Non-interest expenses |  |  |  |  |  |  |  |  |  |  | 146,946 | 128,604 | 130,394
Income before income taxes |  |  |  |  |  |  |  |  |  |  | 108,899 | 145,039 | 133,164
Income tax expense |  |  |  |  |  |  |  |  |  |  | 23,742 | 53,013 | 49,149
Net income |  |  |  |  |  |  |  |  |  |  | 85,157 | 92,026 | 84,015
Preferred stock dividends |  |  |  |  |  |  |  |  |  |  | 14,459 | 14,459 | 9,515
Net income available to common shareholders |  |  |  |  |  |  |  |  |  |  | 70,698 | 77,567 | 74,500
Goodwill and other intangibles | 3,629 |  |  |  | 3,630 |  |  |  | 3,639 |  | 3,629 | 3,630 | 3,639
Total assets | 9,688,146 |  |  |  | 9,769,996 |  |  |  | 9,303,465 |  | 9,688,146 | 9,769,996 | 9,303,465
Total deposits | 6,766,378 |  |  |  | 6,400,310 |  |  |  | 6,846,980 |  | 6,766,378 | 6,400,310 | 6,846,980
Total non-deposit liabilities | 1,719,225 |  |  |  | 2,106,919 |  |  |  | 1,195,087 |  | 1,719,225 | 2,106,919 | 1,195,087
Operating Segments | BankMobile |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  |  |  | 17,003 | 12,919 | 6,896
Interest |  |  |  |  |  |  |  |  |  |  | 400 | 69 | 38
Net interest income |  |  |  |  |  |  |  |  |  |  | 16,603 | 12,850 | 6,858
Provision for loan losses |  |  |  |  |  |  |  |  |  |  | 2,714 | 1,130 | 795
Non-interest income (1) |  |  |  |  |  |  |  |  |  |  | 41,499 | 54,122 | 33,205
Non-interest expenses |  |  |  |  |  |  |  |  |  |  | 73,233 | 87,002 | 47,837
Income before income taxes |  |  |  |  |  |  |  |  |  |  | (17,845) | (21,160) | (8,569)
Income tax expense |  |  |  |  |  |  |  |  |  |  | (4,383) | (7,971) | (3,256)
Net income |  |  |  |  |  |  |  |  |  |  | (13,462) | (13,189) | (5,313)
Preferred stock dividends |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income available to common shareholders |  |  |  |  |  |  |  |  |  |  | (13,462) | (13,189) | (5,313)
Goodwill and other intangibles | 12,870 |  |  |  | 12,665 |  |  |  | 13,982 |  | 12,870 | 12,665 | 13,982
Total assets | 145,279 |  |  |  | 69,559 |  |  |  | 79,271 |  | 145,279 | 69,559 | 79,271
Total deposits | 375,858 |  |  |  | 399,832 |  |  |  | 456,795 |  | 375,858 | 399,832 | 456,795
Total non-deposit liabilities | $ 15,148 |  |  |  | $ 11,530 |  |  |  | $ 28,002 |  | 15,148 | 11,530 | 28,002
Segment Reconciling Items |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  |  |  | $ 15,700 | $ 12,900 | $ 6,900

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