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SCHEDULE I - Parent Company Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash flows from operating activities: |  |  |
Net income | $ 62,158 | $ 14,069 | $ 6,460
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation expense | 66,023 | 66,280 | 69,424
Write-down of equipment | 24,930 | 9,514 | 9,181
Stock-based compensation expenses | 4,270 | 3,717 | 4,150
Excess tax benefit from stock-based compensation |  | 236 | 26
Amortization of deferred costs | 5,183 | 4,271 | 4,307
Allowances and provisions | 162 | (571) | 697
Gain on sale of leased equipment | (4,929) | (3,482) | (8,320)
Gain on insurance settlement | (1,288) |  |
Income from joint ventures | (7,158) | (1,813) | (1,175)
Loss on extinguishment of debt |  | 137 | (1,151)
Deferred income taxes | (26,393) | 9,100 | 6,027
Changes in assets and liabilities: |  |  |
Receivables | (2,525) | (2,287) | (5,769)
Spare parts inventory | (1,855) | (5,093) | 3,828
Intangibles |  | (1,511) |
Other assets | (970) | (1,707) | (2,635)
Accounts payable and accrued expenses | 1,129 | 2,329 | 1,677
Maintenance reserves | 7,994 | 548 | 4,580
Security deposits | 6,246 | (4,048) | 5,747
Unearned lease revenue | 2,279 | 732 | 748
Net cash provided by operating activities | 135,256 | 90,421 | 97,802
Cash flows from investing activities: |  |  |
Proceeds from sale of equipment held for operating lease (net of selling expenses) | 43,791 | 62,525 | 41,608
Capital contribution to joint ventures |  | (5,545) | (630)
Proceeds from Insurance Settlement, Investing Activities | 14,886 |  |
Distributions received from joint venture | 1,880 | 1,167 | 1,304
Maintenance rights payments received |  |  | 5,802
Purchase of equipment held for operating lease | (373,483) | (173,662) | (174,772)
Purchase of maintenance rights |  | (5,530) | (8,844)
Purchase of property, equipment and furnishings | (10,788) | (1,006) | (3,988)
Net cash used in investing activities | (323,714) | (122,051) | (139,520)
Cash flows from financing activities: |  |  |
Proceeds from issuance of notes payable | 686,200 | 149,000 | 192,700
Debt issuance cost | (8,262) | (3,808) | (13)
Proceeds from shares issued under stock compensation plans | 177 | 155 | 518
Preferred stock dividends | (1,311) |  |
Cancellation of restricted stock units in satisfaction of withholding tax | (1,094) | (1,369) | (1,558)
Security deposit | (2,261) | 455 | (1,606)
Repurchase of common stock | (3,546) | (28,958) | (16,500)
Proceeds from issuance of preferred stock | 29,665 | 19,752 |
Principal payments on notes payable | (496,160) | (113,981) | (153,816)
Net cash used in financing activities | 203,408 | 21,246 | 19,725
Increase/(decrease) in cash, cash equivalents and restricted cash | 14,950 | (10,384) | (21,993)
Cash and cash equivalents at beginning of period | 10,076 |  |
Cash and cash equivalents at end of period | 7,052 | 10,076 |
Net cash paid for: |  |  |
Interest | 42,817 | 37,319 | 35,568
Income Taxes | 440 | 459 | 353
Supplemental disclosures of non-cash investing activities: |  |  |
Engines and equipment transferred from Held for operating Lease to Held for sale | 45,018 | 28,560 | 22,079
Engines and equipment transferred from Held for sale to Spare parts inventory | 210 |  | 6,061
Aircraft transferred from Property, equipment and furnishings to Assets held for lease |  | 2,925 |
Accrued Preferred Stock Dividends | 783 | 281 |
Accretion of preferred stock issuance costs | 46 | 8 |
Parent Company |  |  |
Cash flows from operating activities: |  |  |
Net income | 62,158 | 14,069 | 6,460
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Equity in income of subsidiaries | (54,043) | (10,782) | (6,632)
Depreciation expense | 40,560 | 43,451 | 40,623
Write-down of equipment | 17,881 | 5,989 | 6,764
Stock-based compensation expenses | 4,270 | 3,717 | 4,150
Excess tax benefit from stock-based compensation |  | 236 | 26
Amortization of deferred costs | 3,085 | 2,704 | 2,646
Allowances and provisions | 76 | (1) | (17)
Gain on sale of leased equipment | (3,696) | (3,322) | (2,420)
Gain on insurance settlement | (1,288) |  |
Income from joint ventures | (7,158) | (1,813) | (1,175)
Loss on extinguishment of debt |  | 137 |
Deferred income taxes | 4,843 | 4,710 | 1,806
Changes in assets and liabilities: |  |  |
Receivables | 5,366 | (4,884) | (865)
Spare parts inventory | 5,612 | (1,608) | 4,547
Intangibles |  | (750) |
Other assets | (4,259) | (2,648) | (2,420)
Accounts payable and accrued expenses | 2,370 | 3,723 | 4,471
Due to / from subsidiaries | 8,584 | (4,437) | (1,242)
Maintenance reserves | 7,906 | 16,583 | 5,227
Security deposits | 6,876 | (2,283) | 5,354
Unearned lease revenue | 906 | 878 | 817
Net cash provided by operating activities | 100,049 | 63,669 | 68,120
Cash flows from investing activities: |  |  |
Increase in investment in subsidiaries | (45,609) | (2,329) | (23,923)
Distributions received from subsidiaries | 347,626 | 15,500 | 3,791
Proceeds from sale of equipment held for operating lease (net of selling expenses) | 33,118 | 60,893 | 18,792
Capital contribution to joint ventures |  | (5,545) | (630)
Proceeds from Insurance Settlement, Investing Activities | 14,886 |  |
Distributions received from joint venture | 1,880 | 1,167 | 1,304
Maintenance rights payments received |  |  | 5,802
Purchase of equipment held for operating lease | (354,918) | (167,874) | (161,888)
Purchase of maintenance rights |  | (5,530) | (8,844)
Purchase of property, equipment and furnishings | (268) | (443) | (3,736)
Net cash used in investing activities | (3,285) | (104,161) | (169,332)
Cash flows from financing activities: |  |  |
Proceeds from issuance of notes payable | 350,500 | 149,000 | 192,700
Debt issuance cost |  | (3,808) | (13)
Proceeds from shares issued under stock compensation plans | 177 | 155 | 518
Preferred stock dividends | (1,311) |  |
Cancellation of restricted stock units in satisfaction of withholding tax | (1,094) | (1,369) | (1,558)
Security deposit | (2,261) | 455 | (1,606)
Repurchase of common stock | (3,546) | (28,958) | (16,500)
Proceeds from issuance of preferred stock | 29,663 | 19,752 |
Principal payments on notes payable | (470,606) | (93,055) | (71,846)
Net cash used in financing activities | (98,478) | 42,172 | 101,695
Increase/(decrease) in cash, cash equivalents and restricted cash | (1,714) | 1,680 | 483
Cash and cash equivalents at beginning of period | 4,574 | 2,894 | 2,411
Cash and cash equivalents at end of period | 2,860 | 4,574 | 2,894
Net cash paid for: |  |  |
Interest | 21,761 | 20,619 | 16,462
Income Taxes | 180 | 20 | 75
Supplemental disclosures of non-cash investing activities: |  |  |
Engines and equipment transferred to the parent from its subsidiaries | 17,910 | 229 | 41,410
Engines and equipment transferred from Held for operating Lease to Held for sale | 31,571 | 18,194 | 21,786
Engines and equipment transferred from Held for sale to Spare parts inventory |  |  | $ 6,061
Aircraft transferred from Property, equipment and furnishings to Assets held for lease |  | 2,925 |
Transferred from property, equipment and furnishings to Equipment held for Lease | 783 | 281 |
Accrued Preferred Stock Dividends | 46 | 8 |
Accretion of preferred stock issuance costs | $ 46 | $ 8 |

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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=51831255 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831270 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The cash outflow to reacquire common stock during the period. + 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 (a) -URI http://asc.fasb.org/extlink&oid=66902209&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 cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + 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 (e) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=66902209&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 Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + 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 (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the purchase of noncontrolling interest during the period. + References Reference 1: 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=66902209&loc=d3e3213-108585 + Details
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- Definition The cash outflow for payments to acquire rented equipment which is recorded as an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 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 associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group. + References Reference 1: 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=66902209&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + 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 (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition Cash dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations that are returns of capital. Excludes dividends or distributions from equity method investments classified as operating activities. + References No definition available. + Details
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- Definition The cash inflow from the amounts received by the insured under the terms of an insurance contract settlement. This element pertains only to insurance proceeds related to investments, for example fixed assets. It excludes insurance settlements classified as operating cash flows. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + 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=66902209&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 from issuance of callable preferred stock which is identified as being convertible to another type of financial security at the option of the issuer or the holder. + 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 (a) -URI http://asc.fasb.org/extlink&oid=66902209&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 amount received from holders to acquire the entity's shares under incentive and share awards other than stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References No definition available. + Details
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- Definition The cash inflow from sale of machinery and equipment. + 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 (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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- Definition Nonrecurring impairment charges related to the write-off of production-related equipment and inventory. This tag is used when an Entity charges this cost to cost of goods sold. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Amount of increase (decrease) of physical assets used in the normal conduct of business and not intended for resale, from reclassification, impairment, donation, or changes classified as other. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 + Details
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- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: 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=66902209&loc=d3e3602-108585 + 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=66902209&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=66902209&loc=d3e3602-108585 + Details
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- Definition Amount of decrease to net income for accretion of temporary equity to its redemption value to derive net income apportioned to common stockholders. + References No definition available. + Details
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- Definition Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 + Details
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- Definition Represents the value of inventory transferred from equipment held for sale to spare parts inventory. + References No definition available. + Details
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- Definition Represents the amount of equity in earnings (losses) of affiliates and subsidiaries during the period, net of tax. + References No definition available. + Details
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- Definition The increase (decrease) during the reporting period receivables to be collected from (obligations owed to) subsidiary. + References No definition available. + Details
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- Definition Cash dividends or other distributions received from unconsolidated subsidiaries that are returns of capital. Excludes dividends or distributions classified as operating activities. + References No definition available. + Details
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