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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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