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Supplemental Cash Flow Disclosures - Non-cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Supplemental Cash Flow Information [Abstract] |  |  |
Real Estate Owned, Transfer to Real Estate Owned | $ 3,067 | $ 4,824 | $ 8,257
Cash paid during the year for: |  |  |
Interest | 21,552 | 19,208 | 15,818
Income taxes | 27,902 | 19,950 | 8,331
Non-cash investing and financing activities: |  |  |
Loans transferred to other real estate owned and repossessed assets | 1,891 | 0 | 0
Fair value of loans transferred from held to maturity to available for sale | 15,102 | 18,758 | 3,196
Gross (decrease) increase in market value adjustment to securities available for sale | 1,983 | (6,919) | 2,949
Gross (decrease) increase in market value adjustment to derivatives | (783) | (549) | 401
Investments committed to purchase, not settled | 0 | 0 | 694
Noncash or Part Noncash Acquisition, Value of Assets Acquired | $ 37,070 | $ (501,516) | $ 463
Other Significant Noncash Transaction, Consideration Received | 245 | 437 | 0
Treasury stock reissued | $ 2,258 | $ 0 | $ 0
Other Significant Noncash Transaction, Value of Consideration Received | $ 0 | $ 3,769 | $ 0

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 + Details
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