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Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Segment reporting information |  |  |  |
Earned insurance premiums | $ 2.4 | $ 3.4 | $ 7.6 | $ 10.2
Net investment income | 12.2 | 9.6 | 39.7 | 18.2
Net investment income (loss) - BAM Surplus Note interest | 0.0 | 0.0 | 0.0 | 0.0
Net realized and unrealized investment gains | 32.5 | 10.9 | 102.5 | 27.2
Advertising and commission revenues | 38.8 | 28.2 | 103.9 | 89.6
Other revenue | 1.6 | 4.7 | 6.1 | 18.0
Total revenues | 87.5 | 56.8 | 259.8 | 163.2
Loss and loss adjustment expenses | 0.0 | 2.2 | 1.1 | 6.8
Insurance acquisition expenses | 0.9 | 1.3 | 3.1 | 4.4
Other underwriting expenses | 0.1 | 0.2 | 0.3 | 0.4
Cost of sales | 33.1 | 24.0 | 88.7 | 76.9
General and administrative expenses | 44.1 | 42.4 | 162.2 | 144.9
Interest expense | 0.9 | 0.5 | 1.8 | 2.6
Total expenses | 79.1 | 70.6 | 257.2 | 236.0
Pre-tax income (loss) | 8.4 | (13.8) | 2.6 | (72.8)
HG Global |  |  |  |
Segment reporting information |  |  |  |
Earned insurance premiums | 1.8 | 1.2 | 5.0 | 3.1
Net investment income | 1.0 | 0.6 | 2.4 | 1.6
Net investment income (loss) - BAM Surplus Note interest | 4.8 | 4.5 | 14.3 | 13.4
Net realized and unrealized investment gains | 0.1 | (0.3) | 0.4 | 2.3
Advertising and commission revenues | 0.0 | 0.0 | 0.0 | 0.0
Other revenue | 0.0 | 0.0 | 0.0 | 0.0
Total revenues | 7.7 | 6.0 | 22.1 | 20.4
Loss and loss adjustment expenses |  | 0.0 | 0.0 | 0.0
Insurance acquisition expenses | 0.4 | 0.2 | 1.0 | 0.6
Other underwriting expenses | 0.0 | 0.0 | 0.0 | 0.0
Cost of sales | 0.0 | 0.0 | 0.0 | 0.0
General and administrative expenses | 0.3 | 0.6 | 0.8 | 1.4
Interest expense | 0.0 | 0.0 | 0.0 | 0.0
Total expenses | 0.7 | 0.8 | 1.8 | 2.0
Pre-tax income (loss) | 7.0 | 5.2 | 20.3 | 18.4
BAM |  |  |  |
Segment reporting information |  |  |  |
Earned insurance premiums | 0.6 | 0.3 | 1.6 | 1.0
Net investment income | 2.3 | 1.7 | 6.5 | 5.1
Net investment income (loss) - BAM Surplus Note interest | (4.8) | (4.5) | (14.3) | (13.4)
Net realized and unrealized investment gains | 0.7 | (1.6) | 2.8 | 6.5
Advertising and commission revenues | 0.0 | 0.0 | 0.0 | 0.0
Other revenue | 0.2 | 0.4 | 0.8 | 0.8
Total revenues | (1.0) | (3.7) | (2.6) | 0.0
Loss and loss adjustment expenses |  | 0.0 | 0.0 | 0.0
Insurance acquisition expenses | 0.5 | 0.6 | 2.0 | 1.9
Other underwriting expenses | 0.1 | 0.1 | 0.3 | 0.3
Cost of sales | 0.0 | 0.0 | 0.0 | 0.0
General and administrative expenses | 10.3 | 9.3 | 30.7 | 28.1
Interest expense | 0.0 | 0.0 | 0.0 | 0.0
Total expenses | 10.9 | 10.0 | 33.0 | 30.3
Pre-tax income (loss) | (11.9) | (13.7) | (35.6) | (30.3)
MediaAlpha |  |  |  |
Segment reporting information |  |  |  |
Earned insurance premiums | 0.0 | 0.0 | 0.0 | 0.0
Net investment income | 0.0 | 0.0 | 0.0 | 0.0
Net investment income (loss) - BAM Surplus Note interest | 0.0 | 0.0 | 0.0 | 0.0
Net realized and unrealized investment gains | 0.0 | 0.0 | 0.0 | 0.0
Advertising and commission revenues | 37.9 | 27.6 | 101.2 | 88.4
Other revenue | 0.0 | 0.0 | 0.0 | 0.0
Total revenues | 37.9 | 27.6 | 101.2 | 88.4
Loss and loss adjustment expenses |  |  | 0.0 | 0.0
Insurance acquisition expenses | 0.0 | 0.0 | 0.0 | 0.0
Other underwriting expenses | 0.0 | 0.0 | 0.0 | 0.0
Cost of sales | 32.2 | 23.0 | 86.0 | 74.0
General and administrative expenses | 6.1 | 5.7 | 17.9 | 16.3
Interest expense | 0.1 | 0.2 | 0.6 | 0.7
Total expenses | 38.4 | 28.9 | 104.5 | 91.0
Pre-tax income (loss) | (0.5) | (1.3) | (3.3) | (2.6)
Other Operations |  |  |  |
Segment reporting information |  |  |  |
Earned insurance premiums | 0.0 | 1.9 | 1.0 | 6.1
Net investment income | 8.9 | 7.3 | 30.8 | 11.5
Net investment income (loss) - BAM Surplus Note interest | 0.0 | 0.0 | 0.0 | 0.0
Net realized and unrealized investment gains | 31.7 | 12.8 | 99.3 | 18.4
Advertising and commission revenues | 0.9 | 0.6 | 2.7 | 1.2
Other revenue | 1.4 | 4.3 | 5.3 | 17.2
Total revenues | 42.9 | 26.9 | 139.1 | 54.4
Loss and loss adjustment expenses |  | 2.2 | 1.1 | 6.8
Insurance acquisition expenses | 0.0 | 0.5 | 0.1 | 1.9
Other underwriting expenses | 0.0 | 0.1 | 0.0 | 0.1
Cost of sales | 0.9 | 1.0 | 2.7 | 2.9
General and administrative expenses | 27.4 | 26.8 | 112.8 | 99.1
Interest expense | 0.8 | 0.3 | 1.2 | 1.9
Total expenses | 29.1 | 30.9 | 117.9 | 112.7
Pre-tax income (loss) | $ 13.8 | $ (4.0) | $ 21.2 | $ (58.3)

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- Definition Revenue from the sale of advertising time (such as television and radio) or space (newspaper or magazine pages). May also include advertising, marketing and promotional services rendered during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.5,6,7) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
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