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Effects of Interest Rate Swap and Cap Agreements (Detail) - Cash Flow Hedging - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of gains (losses) recognized in OCI on interest rate swap and cap agreements | $ (1,815) | $ (2,616) | $ (5,002) | $ (8,085)
Amount of losses reclassified from accumulated OCI into income | 1,265 | 448 | 2,529 | 913
Tax benefit |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of gains (losses) recognized in OCI on interest rate swap and cap agreements | 1,154 | 1,667 | 3,184 | 5,149
Amount of losses reclassified from accumulated OCI into income | (805) | (285) | (1,610) | (581)
Interest rate swap agreements | Debt Expense (Including Refinancing Charges) |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of gains (losses) recognized in OCI on interest rate swap and cap agreements | 0 | (168) | 0 | (860)
Amount of losses reclassified from accumulated OCI into income | 0 | 123 | 0 | 274
Interest rate cap agreements | Debt Expense (Including Refinancing Charges) |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of gains (losses) recognized in OCI on interest rate swap and cap agreements | (2,969) | (4,115) | (8,186) | (12,374)
Amount of losses reclassified from accumulated OCI into income | $ 2,070 | $ 610 | $ 4,139 | $ 1,220

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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