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8. Interest Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Total interest expense | $ 79,941 | $ 57,745 | $ 50,395
Securitization Trust Debt [Member] |  |  |
Total interest expense | 69,178 | 48,631 | 38,558
Warehouse lines of credit [Member] |  |  |
Total interest expense | 8,569 | 6,127 | 5,217
Senior Secured Debt Related Party [Member] |  |  |
Total interest expense | 0 | 0 | 1,651
Debt Secured by Receivables, Fair Value [Member] |  |  |
Total interest expense | 0 | 0 | 772
Residual interest financing [Member] |  |  |
Total interest expense | 846 | 1,405 | 1,989
Subordinated renewable notes [Member] |  |  |
Total interest expense | $ 1,348 | $ 1,582 | $ 2,208

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- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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