Income Taxes (Details) - USD ($)	3 Months Ended								9 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Income Tax Contingency [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 11,112,376				$ 3,256,200					$ 11,112,376	$ 3,256,200
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	1,021,275				0					1,021,275	0
TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit										(852,523)	10,516,827
Unrecognized Tax Benefits	4,043,623				6,946,229					4,043,623	6,946,229	$ 7,264,966	$ 9,395,413
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions											166,375
Income tax expense	6,984,000	$ 834,000	$ 3,604,000	$ 4,559,000	18,778,000	$ 15,204,000	$ 6,511,000	$ 7,265,000		$ 15,981,057	$ 47,757,808	$ 38,157,492
U.S. federal income tax rate (in hundredths)										21.00%	31.55%	35.00%
Valuation allowance for deferred tax assets	1,274				3,256,200					$ 1,274	$ 3,256,200
Total gross unrecognized tax benefits including interest	5,810,609				8,809,626					5,810,609	8,809,626	$ 8,900,000
Unrecognized tax benefits that are permanent in nature and, if recognized, would affect the annual effective tax rate	5,401,214				6,884,299					5,401,214	6,884,299	7,200,000
Accrued gross interest	1,766,989				$ 1,863,400					1,766,989	1,863,400	1,641,916
Current period gross interest expense										1,051,959	411,975	656,891
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions										54,025		(237,746)
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions										(138,405)	8,228	637,166
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities										(1,356,714)	0	(2,403,982)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations										1,461,512	493,340	125,885
Foreign Earnings Repatriated									$ 17,100,000
Deferred Tax Assets, Capital Loss Carryforwards	7,900,000									7,900,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount										7,900,000
Operating Loss Carryforwards	$ 54,318									54,318
MEXICO
Income Tax Contingency [Line Items]
TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit										$ 0	$ 4,854,640	0
Income tax expense												$ 2,239,345