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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (in thousands) (Parenthetical) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Other Significant Noncash Transactions [Line Items] |  |
Dividends | $ 3.4 | $ 3.4
Accounts Payable and Accrued Liabilities [Member] |  |
Other Significant Noncash Transactions [Line Items] |  |
Capital Expenditures Incurred but Not yet Paid - Instant | $ 117.8 | $ 318.0

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