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Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Balances of AOCI Including Current Period Other Comprehensive Income (Loss) and Reclassifications Out of AOCI (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | [1] | $ 4,162,010 | $ 3,239,962 | $ 4,106,002 | [2] | $ 3,122,381
Other comprehensive income (loss) before reclassifications |  | (8,450) | 3,782 | 9,498 |  | 22,093
Less: gain (loss) reclassified from AOCI |  | (2,334) | 6,493 | (5,086) |  | 11,149
Tax effect |  | 173 | (1,366) | 616 |  | (1,058)
Net current-period other comprehensive income (loss) |  | (5,943) | (4,077) | 15,200 |  | 9,886
Ending balance |  | 4,241,571 | 3,236,679 | 4,241,571 |  | 3,236,679
Unrealized Gains (Losses) on Cash Flow Hedges |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 2,617 | 31,588 | (20,028) |  | 16,614
Other comprehensive income (loss) before reclassifications |  | (7,711) | (2,132) | 12,182 |  | 17,498
Less: gain (loss) reclassified from AOCI |  | (2,334) | 6,493 | (5,086) |  | 11,149
Tax effect |  | 0 | 0 | 0 |  | 0
Net current-period other comprehensive income (loss) |  | (5,377) | (8,625) | 17,268 |  | 6,349
Ending balance |  | (2,760) | 22,963 | (2,760) |  | 22,963
Unrealized Gains (Losses) on Available for-Sale Debt Securities |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 2,387 | 2,539 | 3,889 |  | 3,565
Other comprehensive income (loss) before reclassifications |  | (739) | 5,914 | (2,684) |  | 4,580
Less: gain (loss) reclassified from AOCI |  | 0 | 0 | 0 |  | 0
Tax effect |  | 173 | (1,366) | 616 |  | (1,058)
Net current-period other comprehensive income (loss) |  | (566) | 4,548 | (2,068) |  | 3,522
Ending balance |  | 1,821 | 7,087 | 1,821 |  | 7,087
Other |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  | 0 | 0 | 0 |  | (15)
Other comprehensive income (loss) before reclassifications |  | 0 | 0 | 0 |  | 15
Less: gain (loss) reclassified from AOCI |  | 0 | 0 | 0 |  | 0
Tax effect |  | 0 | 0 | 0 |  | 0
Net current-period other comprehensive income (loss) |  | 0 | 0 | 0 |  | 15
Ending balance |  | 0 | 0 | 0 |  | 0
Total |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | [1] | 5,004 | 34,127 | (16,139) |  | 20,164
Ending balance |  | $ (939) | $ 30,050 | $ (939) |  | $ 30,050
[1] | The beginning balances for the six-month periods were derived from the audited Consolidated Financial Statements included in Company’s Annual Report on Form 10-K for the years ended December 31, 2020, filed with the SEC on February 26, 2021.
[2] | (1)December 31, 2020 balances were derived from the audited Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on February 26, 2021.

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=122038336&loc=d3e74512-122707 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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