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RECEIVABLES AND ALLOWANCE FOR LOAN LOSSES (Details) - USD ($)
 3 Months Ended 6 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Mar. 31, 2017
Sep. 30, 2016
Financing Receivable, Impaired [Line Items]              
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment     $ 46,200,000 $ 40,000,000      
Allowance for Loan Losses [Roll Forward]              
Balance at beginning of period $ 76,526,248 $ 71,993,060 72,194,892 69,565,804      
Provision for loan losses 38,975,972 35,870,744 69,816,030 67,885,021      
Loan losses (32,286,746) (34,724,133) (63,464,210) (67,418,975)      
Recoveries 3,689,277 3,743,900 7,897,911 7,466,298      
Translation adjustment (173,950) (462,260) 286,178 (1,076,837)      
Balance at end of period 86,730,801 76,421,311 86,730,801 76,421,311      
Summary of loans individually and collectively evaluated for impairment [Abstract]              
Bankruptcy, gross loans         $ 5,121,074 $ 4,903,728 $ 5,438,380
91 days or more delinquent, excluding bankruptcy         61,816,576 54,310,791 50,928,815
Loans less than 91 days delinquent and not in bankruptcy         1,080,703,536 1,000,589,613 1,039,210,180
Loans and Leases Receivable, Gross         1,147,641,186 1,059,804,132 1,095,577,375
Unearned interest and fees         (321,439,943) (291,908,651) (305,079,767)
Net loans         826,201,243 767,895,481 790,497,608
Allowance for loan losses (76,526,248) (71,993,060) (72,194,892) (69,565,804) (86,730,801) (72,194,892) (76,421,311)
Loans receivable, net         739,470,442 695,700,589 714,076,297
Loans individually evaluated for impairment (impaired loans) [Member]              
Allowance for Loan Losses [Roll Forward]              
Balance at beginning of period     39,182,951        
Balance at end of period 44,678,508 37,572,665 44,678,508 37,572,665      
Summary of loans individually and collectively evaluated for impairment [Abstract]              
Bankruptcy, gross loans         5,121,074 4,903,728 5,438,380
91 days or more delinquent, excluding bankruptcy         61,816,576 54,310,791 50,928,815
Loans less than 91 days delinquent and not in bankruptcy         0 0 0
Loans and Leases Receivable, Gross         66,937,650 59,214,519 56,367,195
Unearned interest and fees         (17,355,713) (15,336,248) (13,587,281)
Net loans         49,581,937 43,878,271 42,779,914
Allowance for loan losses (44,678,508) (37,572,665) (39,182,951) (37,572,665) (44,678,508) (39,182,951) (37,572,665)
Loans receivable, net         4,903,429 4,695,320 5,207,249
Loans collectively evaluated for impairment [Member]              
Allowance for Loan Losses [Roll Forward]              
Balance at beginning of period     33,011,941        
Balance at end of period 42,052,293 38,848,646 42,052,293 38,848,646      
Summary of loans individually and collectively evaluated for impairment [Abstract]              
Bankruptcy, gross loans         0 0 0
91 days or more delinquent, excluding bankruptcy         0 0 0
Loans less than 91 days delinquent and not in bankruptcy         1,080,703,536 1,000,589,613 1,039,210,180
Loans and Leases Receivable, Gross         1,080,703,536 1,000,589,613 1,039,210,180
Unearned interest and fees         (304,084,230) (276,572,403) (291,492,486)
Net loans         776,619,306 724,017,210 747,717,694
Allowance for loan losses $ (42,052,293) $ (38,848,646) $ (33,011,941) $ (38,848,646) (42,052,293) (33,011,941) (38,848,646)
Loans receivable, net         $ 734,567,013 $ 691,005,269 $ 708,869,048