v3.7.0.1

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Operating activities: |  |
Net loss | $ (15,248) | $ (8,932)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |
Depreciation and amortization | 16,845 | 16,973
Deferred income taxes | (7,883) | 955
Loss on disposal of assets |  | 359
Equity in loss of unconsolidated affiliate | 1,003 |
Inventory valuation reserves | (1,293) | 2,435
Changes in operating assets and liabilities | (1,677) | (28,133)
Net cash used in operating activities | (8,253) | (16,343)
Investing activities: |  |
Purchase of property and equipment | (4,789) | (8,519)
Proceeds from asset dispositions |  | 850
Purchase of short-term investments | (54,867) | (77,677)
Proceeds from sale of short-term investments | 67,659 | 76,184
Payment of deposits on aircraft | (66) | (66)
Net cash provided by (used in) investing activities | 7,937 | (9,228)
Financing activities: |  |
Proceeds from line of credit | 37,300 | 83,500
Payments on line of credit | (35,800) | (53,300)
Repurchase of common stock | (100) | (500)
Net cash provided by (used in) financing activities | 1,400 | 29,700
Increase in cash | 1,084 | 4,129
Cash, beginning of period | 2,596 | 2,407
Cash, end of period | 3,680 | 6,536
Interest | 14,114 | 13,691
Income taxes | 0 | 0
Noncash investing activities: |  |
Other current liabilities and accrued payables related to purchase of property and equipment | $ 348 | $ 29,302

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