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Segment Information - Reconciliation of Comprehensive Income to Adjusted EBITDA (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |
Comprehensive income | $ 107.5 | $ 64.7 | $ 46.3
Foreign currency translation, net of tax | (0.2) | 0.5 | 0.1
Net change in pension benefits, net of tax | 0.8 | 0.0 | 0.0
Net income | 108.1 | 65.2 | 46.4
Depreciation and amortization | 108.6 | 109.7 | 68.3
Interest expense | 43.7 | 28.6 | 20.8
Income tax provision | 60.0 | 46.9 | 30.1
EBITDA | 320.4 | 250.4 | 165.6
Stock-based compensation expense | 18.9 | 13.8 | 11.9
Other charges | 2.5 | 0.0 | (0.4)
Segment Operating Expense | 0.0 | 0.0 | 3.2
Interest, depreciation and amortization expense related to equity investments | 10.0 | 8.5 | 8.7
Other charges and recoveries, net | 0.5 | (5.8) | 2.6
Acquisition expense, net | 3.4 | 21.7 | 10.2
Gain on Calder land sale | (23.7) | 0.0 | 0.0
Calder exit costs | 2.5 | 13.9 | 2.3
Total adjustments to EBITDA | 14.1 | 52.1 | 38.5
Adjusted EBITDA | 334.5 | 302.5 | 204.1
Racing |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 79.7 | 71.8 | 61.2
Casinos |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 125.8 | 114.9 | 107.2
TwinSpires |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 55.2 | 48.6 | 39.8
Big Fish Games |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 79.1 | 68.5 | (0.7)
Other Investments |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 2.7 | 2.9 | 1.6
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | $ (8.0) | $ (4.2) | $ (5.0)

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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