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Revenue Recognition (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 14,178 | $ 13,020 | $ 8,183
Total revenues | (156,259) | (161,627) | (138,488)
Escrow and other title-related fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 7,096 | 6,892 | 2,532
Non-title services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 7,082 | 6,128 | 5,651
Net premiums written |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Other sources of revenue | 138,125 | 140,502 | 122,522
Investment related revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Other sources of revenue | 3,486 | 7,645 | 7,346
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Other sources of revenue | $ 470 | $ 460 | $ 437

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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