Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Measurement [Abstract]

Financial Disclosures About Fair Value Of Financial Instruments

					Fair Value Measurements Using
					Quoted prices
	Carrying				in Active		Significant
	Amount		Fair Value		Markets		Other		Significant
	As of		As of		for Identical		Observable		Unobservable
	December 31,		December 31,		Assets		Inputs		Inputs
	2019		2019		(Level 1)		(Level 2)		(Level 3)
Financial assets:
Cash and cash equivalents	$	356,604		356,604		356,604		—		—
Restricted cash		50,266		50,266		50,266		—		—
Notes receivable, net		449,162		587,000		—		—		587,000
Financial liabilities:
Receivable-backed notes payable	$	422,815		440,900		—		—		440,900
Notes payable and other borrowings		188,731		194,069		—		—		194,069
Junior subordinated debentures		137,254		146,000		—		—		146,000

					Fair Value Measurements Using
					Quoted prices
	Carrying				in Active		Significant
	Amount		Fair Value		Markets		Other		Significant
	As of		As of		for Identical		Observable		Unobservable
	December 31,		December 31,		Assets		Inputs		Inputs
	2018		2018		(Level 1)		(Level 2)		(Level 3)
Financial assets:
Cash and cash equivalents	$	366,305		366,305		366,305		—		—
Restricted cash		54,792		54,792		54,792		—		—
Notes receivable, net		439,167		537,000		—		—		537,000
Financial liabilities:
Receivable-backed notes payable	$	458,931		462,400		—		—		462,400
Notes payable and other borrowings		200,887		203,547		—		—		203,547
Junior subordinated debentures		136,425		132,400		—		—		132,400
Redeemable 5% cumulative preferred stock		9,472		9,538		—		—		9,538