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Condensed Guarantor and Non-Guarantor Financial Statements, Cash Flow Statements (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Cash flows from operating activities: |  |  |  |  |
Net cash provided by operating activities |  |  |  | $ 72.1 | $ 48.3
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  | $ (16.4) | $ (11.6) | (42.3) | (22.9)
Purchase of available for sale securities |  |  |  | (72.4) | (0.5)
Proceeds from disposition of available for sale securities |  |  |  | 30.0 | 84.0
Change in Intercompany Loans Receivable |  |  |  | 0.0 |
Net cash (used in) provided by investing activities | [1] |  |  | (84.7) | 60.6
Cash flows from financing activities |  |  |  |  |
Repayment of Convertible Notes |  |  |  | 0.0 | (175.0)
Proceeds from cash-settled call options related to repayment of Convertible Notes |  |  |  | 0.0 | 94.9
Payment for conversion premium related to repayment of Convertible Notes |  |  |  | 0.0 | (94.9)
Repayment of principal and redemption premium of 8.25% Senior Notes |  |  |  | (206.0) | 0.0
Issuance of 5.875% Senior Notes |  |  |  | 375.0 | 0.0
Cash paid for debt issuance costs |  |  |  | (6.9) | 0.0
Proceeds from stock option exercises |  |  |  | 1.0 | 0.0
Repayment of capital lease |  |  |  | (0.1) | 0.0
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest | [2] |  |  | 0.0 | 1.1
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  |  |  | (2.8) | (3.0)
Repurchase of common stock |  |  |  | (8.5) | (41.4)
Cash dividends paid to stockholders |  |  |  | (16.3) | (14.0)
Intercompany loan |  |  |  |  | 0.0
Cash dividends paid to Parent |  |  |  | 0.0 |
Intercompany loans payable1 |  |  |  | 0.0 |
Net cash provided by (used in) financing activities | [1] |  |  | 135.4 | (232.3)
Net increase in cash and cash equivalents during the period |  |  |  | 122.8 | (123.4)
Cash and cash equivalents at beginning of period |  |  |  | 72.5 | 177.7
Cash and cash equivalents at end of period |  | 195.3 | 54.3 | 195.3 | 54.3
Consolidating Adjustments |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |
Net cash provided by operating activities |  |  |  | (200.0) | 0.0
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  |  |  | 0.0 | 0.0
Purchase of available for sale securities |  |  |  | 0.0 | 0.0
Proceeds from disposition of available for sale securities |  |  |  | 0.0 | 0.0
Change in Intercompany Loans Receivable |  |  |  | 115.9 |
Net cash (used in) provided by investing activities |  |  |  | 115.9 | 0.0
Cash flows from financing activities |  |  |  |  |
Repayment of Convertible Notes |  |  |  |  | 0.0
Proceeds from cash-settled call options related to repayment of Convertible Notes |  |  |  |  | 0.0
Payment for conversion premium related to repayment of Convertible Notes |  |  |  |  | 0.0
Repayment of principal and redemption premium of 8.25% Senior Notes |  |  |  | 0.0 |
Issuance of 5.875% Senior Notes |  |  |  | 0.0 |
Cash paid for debt issuance costs |  |  |  | 0.0 |
Proceeds from stock option exercises |  |  |  | 0.0 |
Repayment of capital lease |  |  |  | 0.0 |
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest |  |  |  |  | 0.0
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  |  |  | 0.0 | 0.0
Repurchase of common stock |  |  |  | 0.0 | 0.0
Cash dividends paid to stockholders |  |  |  | 0.0 | 0.0
Intercompany loan |  |  |  |  | 0.0
Cash dividends paid to Parent |  |  |  | 200.0 |
Intercompany loans payable1 |  |  |  | (115.9) |
Net cash provided by (used in) financing activities |  |  |  | 84.1 | 0.0
Net increase in cash and cash equivalents during the period |  |  |  | 0.0 | 0.0
Cash and cash equivalents at beginning of period |  |  |  | 0.0 | 0.0
Cash and cash equivalents at end of period |  | 0.0 | 0.0 | 0.0 | 0.0
Parent |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |
Net cash provided by operating activities |  |  |  | 190.7 | 233.4
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  |  |  | 0.0 | 0.0
Purchase of available for sale securities |  |  |  | 0.0 | 0.0
Proceeds from disposition of available for sale securities |  |  |  | 0.0 | 0.0
Change in Intercompany Loans Receivable |  |  |  | (219.7) |
Net cash (used in) provided by investing activities |  |  |  | (219.7) | 0.0
Cash flows from financing activities |  |  |  |  |
Repayment of Convertible Notes |  |  |  |  | (175.0)
Proceeds from cash-settled call options related to repayment of Convertible Notes |  |  |  |  | 94.9
Payment for conversion premium related to repayment of Convertible Notes |  |  |  |  | (94.9)
Repayment of principal and redemption premium of 8.25% Senior Notes |  |  |  | (206.0) |
Issuance of 5.875% Senior Notes |  |  |  | 375.0 |
Cash paid for debt issuance costs |  |  |  | (6.9) |
Proceeds from stock option exercises |  |  |  | 1.0 |
Repayment of capital lease |  |  |  | 0.0 |
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest |  |  |  |  | 0.0
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  |  |  | (2.8) | (3.0)
Repurchase of common stock |  |  |  | (8.5) | (41.4)
Cash dividends paid to stockholders |  |  |  | (16.3) | (14.0)
Intercompany loan |  |  |  |  | 0.0
Cash dividends paid to Parent |  |  |  | 0.0 |
Intercompany loans payable1 |  |  |  | (106.5) |
Net cash provided by (used in) financing activities |  |  |  | 29.0 | (233.4)
Net increase in cash and cash equivalents during the period |  |  |  | 0.0 | 0.0
Cash and cash equivalents at beginning of period |  |  |  | 0.0 | 0.0
Cash and cash equivalents at end of period |  | 0.0 | 0.0 | 0.0 | 0.0
Guarantor Subsidiaries |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |
Net cash provided by operating activities |  |  |  | 76.1 | (190.1)
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  |  |  | (40.8) | (14.3)
Purchase of available for sale securities |  |  |  | (72.4) | (0.5)
Proceeds from disposition of available for sale securities |  |  |  | 30.0 | 84.0
Change in Intercompany Loans Receivable |  |  |  | 106.2 |
Net cash (used in) provided by investing activities |  |  |  | 23.0 | 69.2
Cash flows from financing activities |  |  |  |  |
Repayment of Convertible Notes |  |  |  |  | 0.0
Proceeds from cash-settled call options related to repayment of Convertible Notes |  |  |  |  | 0.0
Payment for conversion premium related to repayment of Convertible Notes |  |  |  |  | 0.0
Repayment of principal and redemption premium of 8.25% Senior Notes |  |  |  | 0.0 |
Issuance of 5.875% Senior Notes |  |  |  | 0.0 |
Cash paid for debt issuance costs |  |  |  | 0.0 |
Proceeds from stock option exercises |  |  |  | 0.0 |
Repayment of capital lease |  |  |  | 0.0 |
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest |  |  |  |  | 1.1
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  |  |  | 0.0 | 0.0
Repurchase of common stock |  |  |  | 0.0 | 0.0
Cash dividends paid to stockholders |  |  |  | 0.0 | 0.0
Intercompany loan |  |  |  |  | (5.7)
Cash dividends paid to Parent |  |  |  | (200.0) |
Intercompany loans payable1 |  |  |  | 222.1 |
Net cash provided by (used in) financing activities |  |  |  | 22.1 | (4.6)
Net increase in cash and cash equivalents during the period |  |  |  | 121.2 | (125.5)
Cash and cash equivalents at beginning of period |  |  |  | 72.2 | 175.3
Cash and cash equivalents at end of period |  | 193.4 | 49.8 | 193.4 | 49.8
Non-Guarantor Subsidiaries |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |
Net cash provided by operating activities |  |  |  | 5.3 | 5.0
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  |  |  | (1.5) | (8.6)
Purchase of available for sale securities |  |  |  | 0.0 | 0.0
Proceeds from disposition of available for sale securities |  |  |  | 0.0 | 0.0
Change in Intercompany Loans Receivable |  |  |  | (2.4) |
Net cash (used in) provided by investing activities |  |  |  | (3.9) | (8.6)
Cash flows from financing activities |  |  |  |  |
Repayment of Convertible Notes |  |  |  |  | 0.0
Proceeds from cash-settled call options related to repayment of Convertible Notes |  |  |  |  | 0.0
Payment for conversion premium related to repayment of Convertible Notes |  |  |  |  | 0.0
Repayment of principal and redemption premium of 8.25% Senior Notes |  |  |  | 0.0 |
Issuance of 5.875% Senior Notes |  |  |  | 0.0 |
Cash paid for debt issuance costs |  |  |  | 0.0 |
Proceeds from stock option exercises |  |  |  | 0.0 |
Repayment of capital lease |  |  |  | (0.1) |
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest |  |  |  |  | 0.0
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  |  |  | 0.0 | 0.0
Repurchase of common stock |  |  |  | 0.0 | 0.0
Cash dividends paid to stockholders |  |  |  | 0.0 | 0.0
Intercompany loan |  |  |  |  | 5.7
Cash dividends paid to Parent |  |  |  | 0.0 |
Intercompany loans payable1 |  |  |  | 0.3 |
Net cash provided by (used in) financing activities |  |  |  | 0.2 | 5.7
Net increase in cash and cash equivalents during the period |  |  |  | 1.6 | 2.1
Cash and cash equivalents at beginning of period |  |  |  | 0.3 | 2.4
Cash and cash equivalents at end of period |  | $ 1.9 | $ 4.5 | $ 1.9 | $ 4.5
[1] | See Note 12 for the supplemental disclosure on non-cash transactions.
[2] | See Note 4 and Note 6 for discussion of our adoption of ASU 2016-09 (as defined in Note 1).

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- Definition The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the sale or maturity (principal being due) of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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