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Reportable Segments (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) segment | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($)
Reportable Segments |  |  |  |  |  |
Number of operating segments | segment |  |  |  | 2 |  |
Revenue: |  |  |  |  |  |
Lease rent revenue |  | $ 43,081 | $ 31,337 | $ 82,726 | $ 61,572 |
Maintenance reserve revenue |  | 22,045 | 11,881 | 37,485 | 43,843 |
Revenue From Sale Of Spare Parts |  | 7,061 | 19,383 | 13,347 | 31,979 |
Gain on sale of leased equipment |  | 245 | 3,527 | 886 | 4,509 |
Other Income |  | 1,871 | 1,716 | 3,752 | 3,888 |
Total revenue |  | 74,303 | 67,844 | 138,196 | 145,791 |
Expenses: |  |  |  |  |  |
Depreciation and amortization expense |  | 18,384 | 16,015 | 35,739 | 32,644 |
Cost of spare parts and equipment sales |  | 5,906 | 14,656 | 10,689 | 24,973 |
Write-down of equipment |  | 3,578 | 1,351 | 3,578 | 13,442 |
Cost of spare parts sales |  |  |  | 32,393 |  |
General and administrative |  | 16,782 | 13,065 | 32,393 | 26,265 |
Technical expense |  | 3,232 | 2,448 | 6,909 | 4,740 |
Interest Expense |  | 15,138 | 11,312 | 28,732 | 22,178 |
Total expenses |  | 63,020 | 58,847 | 118,040 | 124,242 |
Earnings from operations |  | 11,283 | 8,997 | 20,156 | 21,549 |
Total assets | [1] | 1,783,435 |  | 1,783,435 |  | $ 1,603,431
Reclassification |  |  |  |  |  |
Expenses: |  |  |  |  |  |
Write-down of equipment |  |  | 900 |  | 1,800 |
Increase to Cost of spare parts and equipment sales |  |  |  | 1,800 |  |
Decrease to Write-down of equipment |  |  |  | (1,800) |  |
Operating Segments | Leasing and Related Operations |  |  |  |  |  |
Revenue: |  |  |  |  |  |
Lease rent revenue |  | 43,081 | 31,337 | 82,726 | 61,572 |
Maintenance reserve revenue |  | 22,045 | 11,881 | 37,485 | 43,843 |
Revenue From Sale Of Spare Parts |  |  | 12,874 |  | 19,299 |
Gain on sale of leased equipment |  | 187 | 3,484 | 767 | 4,440 |
Other Income |  | 1,856 | 1,649 | 3,706 | 3,774 |
Total revenue |  | 67,169 | 61,225 | 124,684 | 132,928 |
Expenses: |  |  |  |  |  |
Depreciation and amortization expense |  | 18,297 | 15,929 | 35,565 | 32,470 |
Cost of spare parts and equipment sales |  |  | 9,918 |  | 14,623 |
Write-down of equipment |  | 3,578 | 1,351 | 3,578 | 13,442 |
Cost of spare parts sales |  |  |  | 30,178 |  |
General and administrative |  | 15,683 | 12,207 |  | 24,620 |
Technical expense |  | 3,232 | 2,448 | 6,909 | 4,740 |
Interest Expense |  | 15,138 | 11,312 | 28,732 | 22,178 |
Total expenses |  | 55,928 | 53,165 | 104,962 | 112,073 |
Earnings from operations |  | 11,241 | 8,060 | 19,722 | 20,855 |
Total assets |  | 1,737,537 |  | 1,737,537 |  | 1,556,406
Operating Segments | Spare Parts Sales |  |  |  |  |  |
Revenue: |  |  |  |  |  |
Revenue From Sale Of Spare Parts |  | 7,061 | 6,509 | 13,347 | 12,680 |
Gain on sale of leased equipment |  | 58 | 43 | 119 | 69 |
Other Income |  | 210 | 276 | 1,323 | 450 |
Total revenue |  | 7,329 | 6,828 | 14,789 | 13,199 |
Expenses: |  |  |  |  |  |
Depreciation and amortization expense |  | 87 | 86 | 174 | 174 |
Cost of spare parts and equipment sales |  | 5,906 | 4,738 | 10,689 | 10,350 |
Cost of spare parts sales |  |  |  | 2,215 |  |
General and administrative |  | 1,099 | 858 |  | 1,645 |
Total expenses |  | 7,092 | 5,682 | 13,078 | 12,169 |
Earnings from operations |  | 237 | 1,146 | 1,711 | 1,030 |
Total assets |  | 45,898 |  | 45,898 |  | $ 47,025
Eliminations |  |  |  |  |  |
Revenue: |  |  |  |  |  |
Other Income |  | (195) | (209) | (1,277) | (336) |
Total revenue |  | (195) | (209) | (1,277) | (336) |
Expenses: |  |  |  |  |  |
Earnings from operations |  | $ (195) | $ (209) | $ (1,277) | $ (336) |
[1] | Total assets at June 30, 2018 and December 31, 2017, respectively, include the following assets of variable interest entities (VIEs) that can only be used to settle the liabilities of the VIEs: Cash $553 and $130; Restricted cash $37,880 and $40,272; Equipment $652,648 and $657,333; and Other $1,207 and $20,090, respectively.

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