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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash Flows from Operating Activities: |  |  |
Net income | $ 154,544 | $ 95,822 | $ 45,292
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 48,387 | 63,759 | 37,919
Amortization of intangible assets | 3,543 | 3,543 | 3,715
Share-based compensation expense | 21,174 | 13,423 | 9,477
Excess income tax benefit from share-based compensation |  | (269) | (186)
Change in debt discounts and deferred debt issuance costs | 17,595 | 10,968 | 2,095
Deferred income taxes | (23,096) | (10,169) | 22,214
Loss (gain) on sale of property and equipment | 1,131 | 453 | (2,909)
Changes in other components of working capital | (60,214) | (90,530) | (128,777)
Other long-term liabilities | 3,656 | 28,210 | 28,912
Other | (3,170) | (1,874) | (3,680)
NET CASH PROVIDED BY OPERATING ACTIVITIES | 163,550 | 113,336 | 14,072
Cash Flows from Investing Activities: |  |  |
Acquisition of property and equipment | (30,280) | (15,743) | (35,912)
Proceeds from sale of property and equipment | 2,744 | 1,899 | 4,980
Investments in securities, restricted | (54,504) |  |
Investments in securities | (6,463) |  |
Proceeds from maturities of investments in securities | 1,370 |  |
Change in restricted cash | 45,724 | (4,651) | (1,483)
NET CASH USED IN INVESTING ACTIVITIES | (41,409) | (18,495) | (32,415)
Cash Flows from Financing Activities: |  |  |
Proceeds from debt | 2,161,384 | 1,353,895 | 1,013,205
Repayment of debt | (2,195,068) | (1,562,684) | (1,054,371)
Issuance of convertible notes |  | 200,000 |
Debt issuance and extinguishment costs | (15,266) | (15,086) |
Cash payments related to share-based compensation | (11,769) | (584) | (808)
Excess income tax benefit from share-based compensation |  | 269 | 186
Distributions paid to noncontrolling interests | (17,499) |  |
Contributions from noncontrolling interests | 2,842 |  |
NET CASH USED IN FINANCING ACTIVITIES | (75,376) | (24,190) | (41,788)
Net increase (decrease) in cash and cash equivalents | 46,765 | 70,651 | (60,131)
Cash and cash equivalents at beginning of year | 146,103 | 75,452 | 135,583
Cash and cash equivalents at end of year | $ 192,868 | $ 146,103 | $ 75,452

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