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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Income (loss) | $ 117,817 | $ (24,154) | $ 58,956
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |
Depreciation and amortization | 264,507 | 259,642 | 245,005
Stock based compensation expense | 5,368 | 5,318 | 4,363
Loss on sale of property and equipment |  | 4,016 |
Gain from equity ownership in TRIP and AirMekong airlines |  | (24,922) | (10,830)
Gain from early extinguishment of debt | (33,660) |  |
Capitalized Brasilia EMB-120 engine overhauls |  | (18,812) | (29,606)
Special items |  | 74,777 |
Net increase in deferred income taxes | 73,844 | 5,054 | 38,007
Changes in operating assets and liabilities: |  |  |
Decrease in restricted cash | 3,366 | 637 | 7,334
Decrease in receivables | 21,076 | 25,540 | 18,916
Increase in income tax receivable | (92) | (1,939) | (840)
Increase in inventories | (2,860) | (890) | (24,513)
Increase in other current assets and prepaid aircraft rents | (28,598) | (25,985) | (31,578)
Decrease in deferred aircraft credits | (8,635) | (7,672) | (8,432)
Increase in accounts payable and accrued aircraft rents | 9,690 | 5,852 | 17,594
Increase (decrease) in other current liabilities | (1,719) | 9,077 | 5,514
NET CASH PROVIDED BY OPERATING ACTIVITIES | 420,104 | 285,539 | 289,890
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Purchases of marketable securities | (1,170,439) | (326,964) | (488,564)
Sales of marketable securities | 1,299,069 | 398,148 | 557,424
Proceeds from the sale of aircraft, property and equipment | 10,308 | 9,473 | 293
Proceeds from installment payment of equity shares of TRIP |  | 17,237 | 16,658
Acquisition of property and equipment: |  |  |
Aircraft and rotable spare parts | (710,871) | (653,473) | (102,499)
Deposits on aircraft |  |  | (40,000)
Buildings and ground equipment | (10,405) | (21,966) | (9,502)
Return of deposits on aircraft | 1,850 |  |
Decrease (increase) in other assets | 10,772 | (7,681) | 229
NET CASH USED IN INVESTING ACTIVITIES | (569,716) | (585,226) | (65,961)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from issuance of long-term debt | 591,881 | 460,600 |
Principal payments on long-term debt | (354,277) | (185,357) | (171,453)
Net proceeds from issuance of common stock | 9,754 | 2,692 | 4,385
Purchase of treasury stock | (18,726) | (8,414) | (11,739)
Payment of cash dividends | (8,260) | (8,195) | (8,258)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES | 220,372 | 261,326 | (187,065)
Increase (decrease) in cash and cash equivalents | 70,760 | (38,361) | 36,864
Cash and cash equivalents at beginning of year | 132,275 | 170,636 | 133,772
CASH AND CASH EQUIVALENTS AT END OF YEAR | 203,035 | 132,275 | 170,636
Cash paid during the year for: |  |  |
Interest, net of capitalized amounts | 80,657 | 67,763 | 71,323
Income taxes | $ 5,104 | $ 2,066 | $ 3,678

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- Definition The cash outflow to acquire equity securities classified as available-for-sale securities, because they are not classified as trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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