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Loans and Leases (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items] |  |  |
Loans and Leases Receivable, Collateral for Secured Borrowings | $ 5,500,000 | $ 6,080,000 |
Advances from Federal Home Loan Banks | 660,200 | 510,300 |
Federal Home Loan Bank Advances, Current Borrowing Capacity | 4,840,000 | 5,570,000 |
Noncovered loans pledged to secure debt obligations | $ 8,260,000 | 8,580,000 |
Charge off of past due business credit card loans (days) | 120 days |  |
Loans and Leases Receivable, Gross, Carrying Amount, Covered | $ 84,800 | 272,600 |
Carrying Value of Loans Held-for-Investment Sold at a Premium or Discount | 77,700 | 45,900 |
Gain (Loss) on Sale of Loans and Leases | 3,758 | 0 | $ 0
Non-PCI Loans |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Accretion Income | 14,300 | 18,700 |
PCI Loans |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Nonaccruing | 3,451 | 7,579 |
Loans on the Cost Recovery Method | PCI Loans |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Carrying value of acquired impaired loans | 500 | 5,300 |
Cordia Bancorp Inc. |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Purchase Discount Remaining | 4,200 |  |
Bancorporation |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Purchase Discount Remaining | 27,400 | 41,100 |
Medical and Dental [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Concentration of Risk, Loan Receivables, Industry | $ 4,660,000 | $ 4,280,000 |
Concentration Risk, Percentage | 21.50% | 21.20% |

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- Definition Current period recognition due to accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans and leases that were sold during the reporting period. This element refers to the gain (loss) and not to the cash proceeds of the sales. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition The fair value, as of the date of each statement of financial position presented, of loans which are owned but transferred to serve as collateral for the payment of other debt obligations, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 + Details
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