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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, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of (losses) gains recognized in OCI on interest rate swap and cap agreements | $ (2,616) | $ (2,453) | $ (8,085) | $ (8,213)
Amount of (losses) gains reclassified from accumulated OCI into income | (448) | (789) | (913) | (1,601)
Tax benefit |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of (losses) gains recognized in OCI on interest rate swap and cap agreements | 1,667 | 1,572 | 5,149 | 5,263
Amount of (losses) gains reclassified from accumulated OCI into income | 285 | 505 | 581 | 1,025
Interest rate swap agreements | Debt Expense (Including Refinancing Charges) |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of (losses) gains recognized in OCI on interest rate swap and cap agreements | (168) | (976) | (860) | (3,670)
Amount of (losses) gains reclassified from accumulated OCI into income | (123) | (684) | (274) | (1,406)
Interest rate cap agreements | Debt Expense (Including Refinancing Charges) |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of (losses) gains recognized in OCI on interest rate swap and cap agreements | (4,115) | (3,049) | (12,374) | (9,806)
Amount of (losses) gains reclassified from accumulated OCI into income | $ (610) | $ (610) | $ (1,220) | $ (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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