17. LF Equity Income Fund Portfolio Investment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Change in fair value of investment	$ 175,855	$ 0
Loss on sale of trading security	(1,085)	0
Net realized and unrealized gain (loss) on investment	13,661	669
Trading Securites - LF Fund Public Securities [Member]
Change in fair value of investment	72,104	0
Loss on sale of trading security	(3,930)	0
Equity Securities - LF Fund Private Securities [Member]
Change in fair value of investment	103,751	0
Equity Securities Forward Contract [Member]
Loss on sale of trading security	2,845	0
Trading Securites Lf Fund Securities [Member]
Net realized and unrealized gain (loss) on investment	$ 174,770	$ 0

Amount of realized and unrealized gain (loss) on investment.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27405-111563

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(c),9(a))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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