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Consolidated Statements of Income and Comprehensive Income (Detail) - Interest Income [Member] - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Interest Rate Swap [Member] |  |
Interest income | $ (28,130) | $ (18,532)
Hedged item - loans [Member] |  |
Interest income | $ (28,130) | $ (18,532)

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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(b)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 + Details
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Period Type: | duration

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- Details
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- Details
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- Details
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