Fair Value Measurements - Information about Valuation Inputs for Variable Interest Entity Assets and Liabilities Classified as Level 3 (Detail) - USD ($)
$ in Thousands

3 Months Ended

6 Months Ended

Jun. 30, 2017

Jun. 30, 2016

Jun. 30, 2017

Jun. 30, 2016

Mar. 31, 2017

Dec. 31, 2016

Mar. 31, 2016

Dec. 31, 2015

Fair Value, Inputs, Level 3 [Member] | European ABS Transactions [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Of Consolidated Variable Interest Entity Debt Obligations Valued Using Unobservable Inputs By Asset Class

$ 2,551,278

Fair Value, Inputs, Level 3 [Member] | US Commercial ABS Transaction [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Of Consolidated Variable Interest Entity Debt Obligations Valued Using Unobservable Inputs By Asset Class

30,942

Fair Value, Inputs, Level 3 [Member] | Successor [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

$ 12,044,498

$ 12,021,381

$ 12,044,498

$ 12,021,381

$ 11,588,457

11,369,112

$ 11,960,555

$ 11,497,098

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

90,285

366,656

343,534

622,647

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

412,299

(883,995)

602,225

(1,110,618)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

25,930

35,781

91,892

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

(79,319)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

(72,473)

48,656

(248,913)

(81,666)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

6,243

22,078

100,798

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three

523,249

(737,898)

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

23,931

351,807

269,852

595,133

Fair Value, Inputs, Level 3 [Member] | Successor [Member] | Investments [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

765,682

722,670

765,682

722,670

721,624

762,703

711,490

488,884

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

16,479

14,616

26,298

27,019

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

10,812

(4,783)

17,097

23,236

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

25,930

35,781

91,892

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

(79,319)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

(9,163)

(4,913)

(18,956)

9,159

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

6,243

22,078

100,798

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

Fair Value, Inputs, Level 3 [Member] | Successor [Member] | European ABS Transactions [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Of Consolidated Variable Interest Entity Debt Obligations Valued Using Unobservable Inputs By Asset Class

2,773,411

Fair Value, Inputs, Level 3 [Member] | Successor [Member] | US Commercial ABS Transaction [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Of Consolidated Variable Interest Entity Debt Obligations Valued Using Unobservable Inputs By Asset Class

30,807

Fair Value, Inputs, Level 3 [Member] | Successor [Member] | Other Assets [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

6,691

8,687

6,691

8,687

7,039

7,382

8,411

8,696

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

(348)

276

(691)

(9)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

(348)

276

(691)

(9)

Fair Value, Inputs, Level 3 [Member] | Successor [Member] | Derivative Financial Instruments, Liabilities [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

52,729

(104,032)

52,729

(104,032)

(100,282)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

51,298

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

101,713

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

3,914

Loan Origination Commitments [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

11,074,772

Long-term Debt [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

(2,258,009)

Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

(99,192)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

(11,030)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

(6,190)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

(11,525)

Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member] | Derivative Financial Instruments, Liabilities [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

52,729

(104,032)

52,729

(104,032)

(102,588)

(109,894)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

54,115

(3,047)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

101,202

8,909

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

4,240

(3,280)

Investment Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

2,577,293

Variable Interest Entity, Primary Beneficiary [Member] | Successor [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

266,629

606,667

Variable Interest Entity, Primary Beneficiary [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member] | Loans Receivable [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

11,690,324

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

676,632

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

(1,163,959)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

128,225

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

676,632

Variable Interest Entity, Primary Beneficiary [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member] | Corporate Debt Securities [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

2,588,556

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

264,592

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

(275,855)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

264,592

Variable Interest Entity, Primary Beneficiary [Member] | Loan Origination Commitments [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

11,301,298

10,658,963

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

378,390

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

586,391

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

(322,446)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

378,390

Variable Interest Entity, Primary Beneficiary [Member] | Loan Origination Commitments [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member] | Loans Receivable [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

11,301,298

11,074,772

11,301,298

11,074,772

11,015,305

11,516,241

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

32,198

516,091

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

402,842

(895,557)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

(149,047)

(62,003)

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

32,198

516,091

Variable Interest Entity, Primary Beneficiary [Member] | Long-term Debt [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

(2,804,218)

(2,258,009)

(2,804,218)

(2,258,009)

(2,716,642)

(2,582,220)

(2,788,416)

$ (3,180,170)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

14,100

(332,605)

(80,307)

(334,557)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

(102,138)

233,100

(148,394)

305,960

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

462

106,663

6,703

(212,860)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three

523,249

(737,898)

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

14,100

(332,605)

(80,307)

(334,557)

Variable Interest Entity, Primary Beneficiary [Member] | Investment Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

2,722,316

$ 2,622,566

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

(31,454)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

147,131

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Purchases

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

(15,927)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

(31,454)

Variable Interest Entity, Primary Beneficiary [Member] | Investment Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Successor [Member] | Corporate Debt Securities [Member]

Fair Value Inputs, Liabilities, Quantitative Information [Line Items]

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

2,722,316

2,577,293

$ 2,722,316

$ 2,577,293

$ 2,663,719

$ 2,622,723

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

(26,259)

171,325

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

100,783

(216,755)

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

(15,927)

Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held

$ (26,259)

$ 171,325