Finance Receivables, net (Schedule of Cash Collections Applied to Principal) (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Receivables [Abstract]
2020	$ 850,955
2021	718,010
2022	562,256
2023	426,004
2024	258,793
2025	137,843
2026	77,642
2027	47,138
2028	38,084
2029	28,474
Thereafter	32,030
Total ERC expected to be applied to principal	$ 3,177,229