Note 2 - Significant Accounting Policies and Consolidated Financial Statement Components - Summary of Allowance for Uncollectible Loans and Fees Receivable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Allowance for uncollectible loans, interest and fees receivable:
Balance at beginning of period	$ (79,200)	$ (63,000)
Provision for loan losses	(34,598)	(15,991)
Charge offs	30,300	22,300
Recoveries	(1,800)	(1,600)
Balance at end of period	(85,300)	(58,300)
Balance at end of period individually evaluated for impairment	(300)		$ (300)
Balance at end of period collectively evaluated for impairment	(85,000)		(78,900)
Loans, interest and fees receivable:
Loans, interest and fees receivable, gross	562,472		541,344
Loans, interest and fees receivable individually evaluated for impairment	700		500
Loans, interest and fees receivable collectively evaluated for impairment	561,800		540,800
Credit Card Receivable [Member]
Allowance for uncollectible loans, interest and fees receivable:
Balance at beginning of period	(35,400)	(18,200)
Provision for loan losses	(19,700)	(9,000)
Charge offs	12,300	6,500
Recoveries	(300)	(100)
Balance at end of period	(43,100)	(20,800)
Balance at end of period individually evaluated for impairment
Balance at end of period collectively evaluated for impairment	(43,100)		(35,400)
Loans, interest and fees receivable:
Loans, interest and fees receivable, gross	211,400		188,600
Loans, interest and fees receivable individually evaluated for impairment
Loans, interest and fees receivable collectively evaluated for impairment	211,400		188,600
Automobile Loan [Member]
Allowance for uncollectible loans, interest and fees receivable:
Balance at beginning of period	(1,300)	(2,300)
Provision for loan losses	(900)
Charge offs	900	700
Recoveries	(300)	(300)
Balance at end of period	(1,600)	(1,900)
Balance at end of period individually evaluated for impairment	(300)		(200)
Balance at end of period collectively evaluated for impairment	(1,300)		(1,100)
Loans, interest and fees receivable:
Loans, interest and fees receivable, gross	90,200		88,100
Loans, interest and fees receivable individually evaluated for impairment	600		400
Loans, interest and fees receivable collectively evaluated for impairment	89,600		87,700
Other Unsecured Lending Products [Member]
Allowance for uncollectible loans, interest and fees receivable:
Balance at beginning of period	(42,500)	(42,500)
Provision for loan losses	(14,000)	(7,000)
Charge offs	17,100	15,100
Recoveries	(1,200)	(1,200)
Balance at end of period	(40,600)	$ (35,600)
Balance at end of period individually evaluated for impairment			(100)
Balance at end of period collectively evaluated for impairment	(40,600)		(42,400)
Loans, interest and fees receivable:
Loans, interest and fees receivable, gross	260,900		264,600
Loans, interest and fees receivable individually evaluated for impairment	100		100
Loans, interest and fees receivable collectively evaluated for impairment	$ 260,800		$ 264,500