Fair Value Disclosures - Summary of Changes in Fair Value of Financial Assets and Liabilities Classified as Level 3 (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Feb. 28, 2013	Nov. 30, 2013	Nov. 30, 2015	Nov. 30, 2014
Assets:
Total gains/(losses) (realized and unrealized)	$ 13,200	$ (3,400)	$ (34,300)	$ (28,600)
Liabilities:
Total gains/ losses (realized and unrealized)	(2,700)	1,100	8,300	(6,000)
Successor [Member] | Corporate equity securities [Member]
Liabilities:
Beginning Balance		38	38	38
Total gains/ losses (realized and unrealized)		0	0	0
Purchases		0	0	0
Sales		0	0	0
Settlements		0	0	0
Issuances		0	0	0
Net transfers into/ (out of) Level 3		0	0	0
Ending Balance	38	38	38	38
Change in unrealized gains/ (losses) relating to instruments still held		0	0	0
Successor [Member] | Corporate debt securities [Member]
Liabilities:
Beginning Balance		1,542	223	0
Total gains/ losses (realized and unrealized)		(1,542)	(110)	(149)
Purchases		0	(6,804)	(565)
Sales		0	6,691	960
Settlements		0	0	0
Issuances		0	0	0
Net transfers into/ (out of) Level 3		0	0	(23)
Ending Balance	1,542	0	0	223
Change in unrealized gains/ (losses) relating to instruments still held		0	0	(8)
Successor [Member] | Net derivatives [Member]
Liabilities:
Beginning Balance		11,185	(4,638)	6,905
Total gains/ losses (realized and unrealized)		4,408	(7,310)	15,055
Purchases		0	(6,705)	(24,682)
Sales		(300)	13,522	1,094
Settlements		(8,515)	37	322
Issuances		0	2,437	0
Net transfers into/ (out of) Level 3		127	2,415	(3,332)
Ending Balance	11,185	6,905	(242)	(4,638)
Change in unrealized gains/ (losses) relating to instruments still held		1,609	4,754	(15,615)
Successor [Member] | Loans [Member]
Liabilities:
Beginning Balance		7,398	14,450	22,462
Total gains/ losses (realized and unrealized)		2,959	(163)	0
Purchases		(16,027)	(2,059)	(18,332)
Sales		28,065	229	11,338
Settlements		67	0	0
Issuances		0	0	0
Net transfers into/ (out of) Level 3		0	(1,988)	(1,018)
Ending Balance	7,398	22,462	10,469	14,450
Change in unrealized gains/ (losses) relating to instruments still held		(2,970)	104	0
Successor [Member] | Other secured financings [Member]
Liabilities:
Beginning Balance		0	30,825	8,711
Total gains/ losses (realized and unrealized)		0	0	0
Purchases		0	0	0
Sales		0	0	0
Settlements		0	(15,704)	(17,525)
Issuances		8,711	36,995	39,639
Net transfers into/ (out of) Level 3		0	(51,572)	0
Ending Balance	0	8,711	544	30,825
Change in unrealized gains/ (losses) relating to instruments still held		0	0	0
Successor [Member] | Embedded conversion option [Member]
Liabilities:
Beginning Balance		16,488	693	9,574
Total gains/ losses (realized and unrealized)		(6,914)	(693)	(8,881)
Purchases		0	0	0
Sales		0	0	0
Settlements		0	0	0
Issuances		0	0	0
Net transfers into/ (out of) Level 3		0	0	0
Ending Balance	16,488	9,574	0	693
Change in unrealized gains/ (losses) relating to instruments still held		6,914	693	8,881
Successor [Member] | Corporate equity securities [Member]
Assets:
Beginning Balance		13,234	20,964	9,884
Total gains/(losses) (realized and unrealized)		1,551	11,154	957
Purchases		3,583	21,385	18,138
Sales		(7,141)	(6,391)	(12,826)
Settlements		0	0	0
Issuances		0	0	0
Net transfers into/ (out of) Level 3		(1,343)	(6,206)	4,811
Ending Balance	13,234	9,884	40,906	20,964
Change in unrealized gains/(losses) relating to instruments still held		(419)	11,424	2,324
Successor [Member] | Corporate debt securities [Member]
Assets:
Beginning Balance		31,820	22,766	25,666
Total gains/(losses) (realized and unrealized)		(2,454)	(11,013)	6,629
Purchases		31,014	21,534	38,316
Sales		(34,125)	(14,636)	(40,328)
Settlements		0	0	0
Issuances		0	0	0
Net transfers into/ (out of) Level 3		(589)	7,225	(7,517)
Ending Balance	31,820	25,666	25,876	22,766
Change in unrealized gains/(losses) relating to instruments still held		(2,749)	(9,443)	8,982
Successor [Member] | Collateralized debt obligations [Member]
Assets:
Beginning Balance		24,736	124,650	37,216
Total gains/(losses) (realized and unrealized)		(2,309)	(66,332)	(6,386)
Purchases		45,437	104,998	204,337
Sales		(32,874)	(107,381)	(181,757)
Settlements		0	(5,754)	(1,297)
Issuances		0	0	0
Net transfers into/ (out of) Level 3		2,226	34,911	72,537
Ending Balance	24,736	37,216	85,092	124,650
Change in unrealized gains/(losses) relating to instruments still held		(8,384)	(48,514)	(1,141)
Successor [Member] | Municipal securities [Member]
Assets:
Beginning Balance			0
Total gains/(losses) (realized and unrealized)			10
Purchases			0
Sales			0
Settlements			(21,551)
Issuances			0
Net transfers into/ (out of) Level 3			21,541
Ending Balance			0	0
Change in unrealized gains/(losses) relating to instruments still held			0
Successor [Member] | Sovereign obligations [Member]
Assets:
Beginning Balance			0
Total gains/(losses) (realized and unrealized)			47
Purchases			1,032
Sales			(1,031)
Settlements			0
Issuances			0
Net transfers into/ (out of) Level 3			72
Ending Balance			120	0
Change in unrealized gains/(losses) relating to instruments still held			39
Successor [Member] | US government and federal agency securities [Member]
Assets:
Beginning Balance			0	0
Total gains/(losses) (realized and unrealized)				13
Purchases				2,505
Sales				(2,518)
Settlements				0
Issuances				0
Net transfers into/ (out of) Level 3				0
Ending Balance		0		0
Change in unrealized gains/(losses) relating to instruments still held				0
Successor [Member] | Residential mortgage-backed securities [Member]
Assets:
Beginning Balance		169,426	82,557	105,492
Total gains/(losses) (realized and unrealized)		(4,897)	(12,951)	(9,870)
Purchases		89,792	18,961	42,632
Sales		(150,807)	(31,762)	(61,689)
Settlements		(11,007)	(597)	(1,847)
Issuances		0	0	0
Net transfers into/ (out of) Level 3		12,985	14,055	7,839
Ending Balance	169,426	105,492	70,263	82,557
Change in unrealized gains/(losses) relating to instruments still held		(6,932)	(4,498)	(4,679)
Successor [Member] | Commercial mortgage-backed securities [Member]
Assets:
Beginning Balance		17,794	26,655	17,568
Total gains/(losses) (realized and unrealized)		(4,469)	(3,813)	(4,237)
Purchases		20,130	3,480	49,159
Sales		(13,538)	(10,146)	(51,360)
Settlements		(100)	(6,861)	(782)
Issuances		0	0	0
Net transfers into/ (out of) Level 3		(2,249)	5,011	16,307
Ending Balance	17,794	17,568	14,326	26,655
Change in unrealized gains/(losses) relating to instruments still held		(3,794)	(3,205)	(2,384)
Successor [Member] | Other asset-backed securities [Member]
Assets:
Beginning Balance		1,292	2,294	12,611
Total gains/(losses) (realized and unrealized)		(4,535)	(990)	1,784
Purchases		105,291	42,922	4,987
Sales		(104,711)	(1,299)	(18,002)
Settlements		0	(2)	0
Issuances		0	0	0
Net transfers into/ (out of) Level 3		15,274	0	914
Ending Balance	1,292	12,611	42,925	2,294
Change in unrealized gains/(losses) relating to instruments still held		(3,497)	(254)	1,484
Successor [Member] | Loans and other receivables [Member]
Assets:
Beginning Balance		170,986	97,258	145,890
Total gains/(losses) (realized and unrealized)		15,008	(14,755)	(31,311)
Purchases		287,757	792,345	130,169
Sales		(115,231)	(576,536)	(92,140)
Settlements		(211,805)	(124,365)	(60,390)
Issuances		0	0	0
Net transfers into/ (out of) Level 3		(825)	15,342	5,040
Ending Balance	170,986	145,890	189,289	97,258
Change in unrealized gains/(losses) relating to instruments still held		13,402	(16,802)	(26,864)
Successor [Member] | Investments at fair value [Member]
Assets:
Beginning Balance		39,693	53,224	66,931
Total gains/(losses) (realized and unrealized)		(1,317)	64,380	13,781
Purchases		28,515	5,510	32,493
Sales		(102)	(124,852)	(43,286)
Settlements		(875)	(4,093)	(1,243)
Issuances		0	0	0
Net transfers into/ (out of) Level 3		1,017	58,951	(15,452)
Ending Balance	39,693	66,931	53,120	53,224
Change in unrealized gains/(losses) relating to instruments still held		(1,290)	$ (388)	$ (1,876)
Predecessor [Member] | Corporate equity securities [Member]
Liabilities:
Beginning Balance	38	38
Total gains/ losses (realized and unrealized)	0
Purchases	0
Sales	0
Settlements	0
Net transfers into/ (out of) Level 3	0
Ending Balance	38
Change in unrealized gains/ (losses) relating to instruments still held	0
Predecessor [Member] | Residential mortgage-backed securities [Member]
Liabilities:
Beginning Balance	0	1,542
Total gains/ losses (realized and unrealized)	25
Purchases	(73,846)
Sales	75,363
Settlements	0
Net transfers into/ (out of) Level 3	0
Ending Balance	1,542
Change in unrealized gains/ (losses) relating to instruments still held	(19)
Predecessor [Member] | Net derivatives [Member]
Liabilities:
Beginning Balance	9,188	11,185
Total gains/ losses (realized and unrealized)	2,648
Purchases	0
Sales	0
Settlements	0
Net transfers into/ (out of) Level 3	(651)
Ending Balance	11,185
Change in unrealized gains/ (losses) relating to instruments still held	(2,648)
Predecessor [Member] | Loans [Member]
Liabilities:
Beginning Balance	1,711	7,398
Total gains/ losses (realized and unrealized)	0
Purchases	(1,711)
Sales	7,398
Settlements	0
Net transfers into/ (out of) Level 3	0
Ending Balance	7,398
Change in unrealized gains/ (losses) relating to instruments still held	0
Predecessor [Member] | Corporate equity securities [Member]
Assets:
Beginning Balance	16,815	13,234
Total gains/(losses) (realized and unrealized)	200
Purchases	707
Sales	109
Settlements	0
Net transfers into/ (out of) Level 3	(4,597)
Ending Balance	13,234
Change in unrealized gains/(losses) relating to instruments still held	172
Predecessor [Member] | Corporate debt securities [Member]
Assets:
Beginning Balance	3,631	31,820
Total gains/(losses) (realized and unrealized)	7,836
Purchases	11,510
Sales	(1,918)
Settlements	0
Net transfers into/ (out of) Level 3	10,761
Ending Balance	31,820
Change in unrealized gains/(losses) relating to instruments still held	7,833
Predecessor [Member] | Collateralized debt obligations [Member]
Assets:
Beginning Balance	31,255	24,736
Total gains/(losses) (realized and unrealized)	3,584
Purchases	4,406
Sales	(17,374)
Settlements	0
Net transfers into/ (out of) Level 3	2,865
Ending Balance	24,736
Change in unrealized gains/(losses) relating to instruments still held	(1,165)
Predecessor [Member] | Residential mortgage-backed securities [Member]
Assets:
Beginning Balance	156,069	169,426
Total gains/(losses) (realized and unrealized)	11,906
Purchases	132,773
Sales	(130,143)
Settlements	(6,057)
Net transfers into/ (out of) Level 3	4,878
Ending Balance	169,426
Change in unrealized gains/(losses) relating to instruments still held	4,511
Predecessor [Member] | Commercial mortgage-backed securities [Member]
Assets:
Beginning Balance	30,202	17,794
Total gains/(losses) (realized and unrealized)	(995)
Purchases	2,280
Sales	(2,866)
Settlements	(1,188)
Net transfers into/ (out of) Level 3	(9,639)
Ending Balance	17,794
Change in unrealized gains/(losses) relating to instruments still held	(2,059)
Predecessor [Member] | Other asset-backed securities [Member]
Assets:
Beginning Balance	1,114	1,292
Total gains/(losses) (realized and unrealized)	90
Purchases	1,627
Sales	(1,342)
Settlements	(19)
Net transfers into/ (out of) Level 3	(178)
Ending Balance	1,292
Change in unrealized gains/(losses) relating to instruments still held	39
Predecessor [Member] | Loans and other receivables [Member]
Assets:
Beginning Balance	180,393	170,986
Total gains/(losses) (realized and unrealized)	(8,682)
Purchases	105,650
Sales	(29,828)
Settlements	(61,407)
Net transfers into/ (out of) Level 3	(15,140)
Ending Balance	170,986
Change in unrealized gains/(losses) relating to instruments still held	(12,374)
Predecessor [Member] | Investments at fair value [Member]
Assets:
Beginning Balance	48,879	$ 39,693
Total gains/(losses) (realized and unrealized)	(756)
Purchases	5,000
Sales	(4,656)
Settlements	(7,676)
Net transfers into/ (out of) Level 3	(1,098)
Ending Balance	39,693
Change in unrealized gains/(losses) relating to instruments still held	$ (473)