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Commitments and Contingencies (Details) $ in Thousands | Mar. 31, 2019 USD ($) Advances | Dec. 31, 2018 USD ($)
--- | --- | ---
Guarantor Obligations [Line Items] |  |
FDIC shared-loss payable | $ 107,256 | $ 105,618
Number Of Federal Home Loan Bank Advances | Advances |  |
Standby Letters of Credit |  |
Guarantor Obligations [Line Items] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 152,862 | 147,333
Commitments to Extend Credit |  |
Guarantor Obligations [Line Items] |  |
Unused Commitments to Extend Credit | 10,187,550 | 10,054,712
Qualified Affordable Housing Project Investments, Commitment | 91,719 | 96,467
Qualified Affordable Housing Project Investments | $ 72,002 | $ 67,952

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- Definition Amount of investment in qualified affordable housing projects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=114775393&loc=SL49122993-202985 + Details
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