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Premises and Equipment (Narrative) (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Property, Plant and Equipment [Abstract] |  |  |
Depreciation and amortization of premises and equipment, year to date | $ 36,000 | $ 28,500 | $ 23,500
Gain on sale and lease-back of property plant equipment | 10,300 |  |
Deferred gain on sale of property | $ 7,099 | $ 0 | $ 0

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- Definition Depreciation and amortization of premises and equipment, year to date. + References No definition available. + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: 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 amount of the gain recorded in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller to be recognized in future periods. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 25 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6456126&loc=d3e49567-112750 + Details
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