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Condensed Guarantor and Non-Guarantor Financial Information, Cash Flow Statements (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Cash flows from operating activities: |  |  |  |  |
Net cash provided by (used in) operating activities | [1] |  |  | $ 84.0 | $ 73.1
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  | $ (16.1) | $ (24.9) | (35.8) | (39.7)
Purchase of available for sale securities |  |  |  | (24.0) | (128.0)
Purchase of equity securities |  |  |  | (0.9) | 0.0
Proceeds from disposition of available for sale securities |  |  |  | 136.6 | 184.2
Intercompany loans receivable |  |  |  | 0.0 | 0.0
Net cash provided by investing activities | [2] |  |  | 75.9 | 16.5
Cash flows from financing activities |  |  |  |  |
Repayment of capital lease |  |  |  | (0.3) | (0.1)
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  |  |  | (6.9) | (4.5)
Repurchase of common stock |  |  |  | (18.9) | (64.4)
Cash dividends paid to Parent |  |  |  | 0.0 |
Cash dividends and dividend equivalents paid |  |  |  | (19.3) | (17.9)
Intercompany loans payable |  |  |  | 0.0 | 0.0
Net cash used in financing activities | [2] |  |  | (45.4) | (86.9)
Net increase in cash, cash equivalents, and restricted cash during the period |  |  |  | 114.5 | 2.7
Cash, cash equivalents and restricted cash at beginning of period |  |  |  | 64.3 | 67.7
Cash, cash equivalents and restricted cash at end of period |  | 178.8 | 70.4 | 178.8 | 70.4
Consolidating Adjustments |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |
Net cash provided by (used in) operating activities |  |  |  | (100.0) | 0.0
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  |  |  | 0.0 | 0.0
Purchase of available for sale securities |  |  |  | 0.0 | 0.0
Purchase of equity securities |  |  |  | 0.0 |
Proceeds from disposition of available for sale securities |  |  |  | 0.0 | 0.0
Intercompany loans receivable |  |  |  | 41.7 | (101.2)
Net cash provided by investing activities |  |  |  | 41.7 | (101.2)
Cash flows from financing activities |  |  |  |  |
Repayment of capital lease |  |  |  | 0.0 | 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 Parent |  |  |  | 100.0 |
Cash dividends and dividend equivalents paid |  |  |  | 0.0 | 0.0
Intercompany loans payable |  |  |  | (41.7) | 101.2
Net cash used in financing activities |  |  |  | 58.3 | 101.2
Net increase in cash, cash equivalents, and restricted cash during the period |  |  |  | 0.0 | 0.0
Cash, cash equivalents and restricted cash at beginning of period |  |  |  | 0.0 | 0.0
Cash, cash equivalents and restricted cash at end of period |  | 0.0 | 0.0 | 0.0 | 0.0
Parent |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |
Net cash provided by (used in) operating activities |  |  |  | 87.9 | (12.3)
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  |  |  | 0.0 | 0.0
Purchase of available for sale securities |  |  |  | 0.0 | 0.0
Purchase of equity securities |  |  |  | 0.0 |
Proceeds from disposition of available for sale securities |  |  |  | 0.0 | 0.0
Intercompany loans receivable |  |  |  | (42.8) | 99.1
Net cash provided by investing activities |  |  |  | (42.8) | 99.1
Cash flows from financing activities |  |  |  |  |
Repayment of capital lease |  |  |  | 0.0 | 0.0
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares |  |  |  | (6.9) | (4.5)
Repurchase of common stock |  |  |  | (18.9) | (64.4)
Cash dividends paid to Parent |  |  |  | 0.0 |
Cash dividends and dividend equivalents paid |  |  |  | (19.3) | (17.9)
Intercompany loans payable |  |  |  | 0.0 | 0.0
Net cash used in financing activities |  |  |  | (45.1) | (86.8)
Net increase in cash, cash equivalents, and restricted cash during the period |  |  |  | 0.0 | 0.0
Cash, cash equivalents and restricted cash at beginning of period |  |  |  | 0.0 | 0.0
Cash, cash equivalents and restricted cash at end of period |  | 0.0 | 0.0 | 0.0 | 0.0
Guarantor Subsidiaries |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |
Net cash provided by (used in) operating activities |  |  |  | 96.3 | 82.5
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  |  |  | (35.2) | (39.5)
Purchase of available for sale securities |  |  |  | (24.0) | (128.0)
Purchase of equity securities |  |  |  | (0.9) |
Proceeds from disposition of available for sale securities |  |  |  | 136.6 | 184.2
Intercompany loans receivable |  |  |  | 0.0 | (0.1)
Net cash provided by investing activities |  |  |  | 76.5 | 16.6
Cash flows from financing activities |  |  |  |  |
Repayment of capital lease |  |  |  | (0.3) | (0.1)
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 Parent |  |  |  | (100.0) |
Cash dividends and dividend equivalents paid |  |  |  | 0.0 | 0.0
Intercompany loans payable |  |  |  | 41.7 | (101.2)
Net cash used in financing activities |  |  |  | (58.6) | (101.3)
Net increase in cash, cash equivalents, and restricted cash during the period |  |  |  | 114.2 | (2.2)
Cash, cash equivalents and restricted cash at beginning of period |  |  |  | 61.3 | 65.1
Cash, cash equivalents and restricted cash at end of period |  | 175.5 | 62.9 | 175.5 | 62.9
Non-Guarantor Subsidiaries |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |
Net cash provided by (used in) operating activities |  |  |  | (0.2) | 2.9
Cash flows from investing activities |  |  |  |  |
Capital expenditures |  |  |  | (0.6) | (0.2)
Purchase of available for sale securities |  |  |  | 0.0 | 0.0
Purchase of equity securities |  |  |  | 0.0 |
Proceeds from disposition of available for sale securities |  |  |  | 0.0 | 0.0
Intercompany loans receivable |  |  |  | 1.1 | 2.2
Net cash provided by investing activities |  |  |  | 0.5 | 2.0
Cash flows from financing activities |  |  |  |  |
Repayment of capital lease |  |  |  | 0.0 | 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 Parent |  |  |  | 0.0 |
Cash dividends and dividend equivalents paid |  |  |  | 0.0 | 0.0
Intercompany loans payable |  |  |  | 0.0 | 0.0
Net cash used in financing activities |  |  |  | 0.0 | 0.0
Net increase in cash, cash equivalents, and restricted cash during the period |  |  |  | 0.3 | 4.9
Cash, cash equivalents and restricted cash at beginning of period |  |  |  | 3.0 | 2.6
Cash, cash equivalents and restricted cash at end of period |  | $ 3.3 | $ 7.5 | $ 3.3 | $ 7.5
[1] | See Note 8 for adjustments made to arrive at our Consolidated Balance Sheet as of January 1, 2018 upon adopting ASC 606 (as defined in Note 1).
[2] | See Note 12 for the supplemental disclosure on non-cash transactions.

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