| | | 2013 | | 2012 | | ||
| Total future minimum lease payments receivable | | $ | 560,187,391 | | $ | 380,608,263 | |
| Less: executory cost | | | (134,447,605) | | | (113,529,216) | |
| Less: unearned interest income | | | (241,234,839) | | | (138,668,584) | |
| Net investment in sales - type leases | | | 184,504,947 | | | 128,410,463 | |
| Current portion | | | 9,063,386 | | | 10,389,028 | |
| Noncurrent portion | | $ | 175,441,561 | | $ | 118,021,435 | |