In millions, except per share items | Dec-31-14 | Dec-31-13 | Dec-31-12 | Dec-31-11 | Dec-31-10 | Mar-06-10 | Mar-05-10 | Dec-31-09 |
| 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
Cash flows from operating activities | | | | | | | | |
Net loss | 3.9 | -23.4 | -58.9 | | | | | |
|
Adjustments to reconcile net loss to net cash flows from operating activities | | | | | | | | |
Depreciation, depletion and amortization | 28.9 | 27.4 | 30.2 | 27.7 | | | | |
Share-based and other compensation | 3.2 | 4.3 | 2.2 | 1.3 | | | | |
Amortization of deferred loan costs | 0.5 | 0.5 | 2.8 | 1.7 | | | | |
(Gain) loss from derivative financial instruments | -20.3 | -1.7 | 67.2 | -1.7 | | | | |
Gain on disposal of assets | -0.1 | -0.2 | 5.7 | -10.6 | | | | |
Other non-cash changes to items affecting net loss | | | 0.4 | 0.6 | | | | |
|
Changes in operating assets and liabilities | | | | | | | | |
Accounts receivable | -1.7 | -0.5 | 1.5 | 2.7 | | | | |
Accounts payable | -2.9 | -3.6 | -9.2 | -2.5 | | | | |
Other | -0.6 | 0.5 | 5.0 | 0.0 | | | | |
Net cash flows from operating activities | 19.6 | 11.2 | 69.1 | | | | | |
|
Cash flows used in investing activities | | | | | | | | |
Restricted cash | | 1.5 | -1.5 | 0.0 | | | | |
Proceeds from sale of assets | 0.6 | 1.1 | 0.5 | 12.7 | | | | |
Net cash flows used in investing activities | -10.5 | -49.7 | 35.6 | | | | | |
|
Cash flows from used in financing activities | | | | | | | | |
Proceeds from debt | 63.0 | 98.5 | 57.5 | 3.0 | | | | |
Repayments of debt | -72.0 | -64.0 | -193.0 | -18.3 | | | | |
Debt and equity financing costs | -0.1 | -0.6 | -2.3 | | | | | |
Proceeds from issuance of common stock | 21.8 | 4.1 | 20.7 | 1.6 | | | | |
Net cash flows used in financing activities | -9.1 | 37.9 | -104.6 | | | | | |
|
Net increase (decrease) in cash and cash equivalents | 0.0 | -0.5 | 0.2 | -0.4 | | | | |
Cash and cash equivalents beginning of period | 0.0 | 0.5 | 0.3 | 0.7 | | | | |
Cash and cash equivalents end of period | 0.0 | 0.0 | 0.5 | 0.3 | | | | |