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SCHEDULE I - Parent Company Information - Condensed Statements of Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
REVENUE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease rent revenue |  |  |  |  |  |  |  |  |  |  |  |  | $ 107,866 | $ 101,748 | $ 101,737
Maintenance reserve revenue |  |  |  |  |  |  |  |  |  |  |  |  | 55,064 | 53,363 | 46,694
Spare Parts Sales |  |  |  |  |  |  |  |  |  |  |  |  | 25,608 | 8,917 |
Gain on sale of leased equipment |  |  |  |  |  |  |  |  |  |  |  |  | 8,354 | 5,753 | 5,675
Other revenue |  |  |  |  |  |  |  |  |  |  |  |  | 2,718 | 4,506 | 4,306
Total revenue | $ 55,195 | $ 57,758 | $ 43,843 | $ 42,814 | $ 41,563 | $ 45,519 | $ 43,865 | $ 43,340 | $ 47,203 | $ 37,952 | $ 37,953 | $ 35,304 | 199,610 | 174,287 | 158,412
EXPENSES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost Of Spare Parts and Equipment Sales |  |  |  |  |  |  |  |  |  |  |  |  | 17,866 | 7,474 |
Write-down of equipment |  |  |  |  |  |  |  |  |  |  |  |  | 9,181 | 5,602 | 6,461
General and administrative |  |  |  |  |  |  |  |  |  |  |  |  | 42,744 | 35,859 | 33,868
Technical expense |  |  |  |  |  |  |  |  |  |  |  |  | 9,403 | 12,336 | 12,863
Net finance costs: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 39,012 | 37,062 | 38,719
Total net finance costs |  |  |  |  |  |  |  |  |  |  |  |  | 37,861 | 37,062 | 38,719
Total expenses |  |  |  |  |  |  |  |  |  |  |  |  | 186,641 | 163,774 | 150,638
Earnings from operations |  |  |  |  |  |  |  |  |  |  |  |  | 12,969 | 10,513 | 7,774
Earnings from joint ventures |  |  |  |  |  |  |  |  |  |  |  |  | 1,175 | 1,329 | 3,526
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  | 14,144 | 11,842 | 11,300
Income tax (expense) benefit |  |  |  |  |  |  |  |  |  |  |  |  | (6,788) | (4,595) | 4,326
Net income | $ 2,973 | $ 2,577 | $ (492) | $ 2,298 | $ (277) | $ 979 | $ 2,214 | $ 4,331 | $ 6,553 | $ (2,229) | $ 9,692 | $ 1,610 | 7,356 | 7,247 | 15,626
Parent Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
REVENUE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease rent revenue |  |  |  |  |  |  |  |  |  |  |  |  | 63,214 | 50,749 | 36,593
Maintenance reserve revenue |  |  |  |  |  |  |  |  |  |  |  |  | 29,896 | 22,270 | 14,046
Spare Parts Sales |  |  |  |  |  |  |  |  |  |  |  |  | 20,236 | 7,588 |
Gain on sale of leased equipment |  |  |  |  |  |  |  |  |  |  |  |  | 2,488 | 2,147 | 3,472
Other revenue |  |  |  |  |  |  |  |  |  |  |  |  | 7,017 | 5,227 | 8,022
Total revenue |  |  |  |  |  |  |  |  |  |  |  |  | 122,851 | 87,981 | 62,133
EXPENSES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  |  |  |  |  |  | 40,867 | 29,555 | 19,699
Cost Of Spare Parts and Equipment Sales |  |  |  |  |  |  |  |  |  |  |  |  | 13,576 | 6,354 |
Write-down of equipment |  |  |  |  |  |  |  |  |  |  |  |  | 6,764 | 4,681 | 4,204
General and administrative |  |  |  |  |  |  |  |  |  |  |  |  | 35,898 | 29,546 | 29,907
Technical expense |  |  |  |  |  |  |  |  |  |  |  |  | 6,805 | 4,455 | 5,478
Net finance costs: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 18,448 | 13,500 | 15,030
Total expenses |  |  |  |  |  |  |  |  |  |  |  |  | 122,358 | 88,091 | 74,318
Earnings from operations |  |  |  |  |  |  |  |  |  |  |  |  | 493 | (110) | (12,185)
Earnings from joint ventures |  |  |  |  |  |  |  |  |  |  |  |  | 1,175 | 1,329 | 3,526
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  | 1,668 | 1,219 | (8,659)
Income tax (expense) benefit |  |  |  |  |  |  |  |  |  |  |  |  | 2,090 | 1,708 | (4,525)
Equity in income of subsidiaries, net of tax of $199, $3,357, and $8,749 at December 31, 2013, 2012 and 2011, respectively |  |  |  |  |  |  |  |  |  |  |  |  | 7,778 | 7,736 | 19,760
Net income |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,356 | $ 7,247 | $ 15,626

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