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Investments (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Jun. 03, 2014
Investments |  |  |  |  |  |  |  |
Investment in WMES joint ventures at beginning of the period |  | $ 41,295 | $ 41,590 |  |  |  |  |
Investment |  | 5,545 | 630 | $ 17,623 |  |  |  |
Earnings from joint venture |  | 1,813 | 1,175 |  |  |  |  |
Distribution |  | (1,167) | (1,304) |  |  |  |  |
Foreign Currency Translation Adjustment |  | 868 | (796) |  |  |  |  |
Investment in WMES joint ventures at end of the period |  | 45,406 | 41,295 | 41,590 |  |  |  |
Amortization of deferred gain |  | (1,212) |  |  |  |  |  |
Property Subject to or Available for Operating Lease, Net | $ 49,100 |  |  |  | $ 1,136,603 | $ 1,109,168 | $ 1,057,381 |
Equity Method Investments |  | 41,295 | 41,590 | 41,590 | $ 45,406 | 41,295 | 41,590 |
WMES |  |  |  |  |  |  |  |
Investments |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  | 50.00% |  |  |
Investment in WMES joint ventures at beginning of the period |  | 27,272 | 26,672 |  |  |  |  |
Investment |  | 5,545 | 630 |  |  |  |  |
Earnings from joint venture |  | 2,032 | 1,274 |  |  |  |  |
Distribution |  | (1,167) | (1,304) |  |  |  |  |
Investment in WMES joint ventures at end of the period |  | 32,470 | 27,272 | 26,672 |  |  |  |
Amortization of deferred gain |  | (1,212) |  |  |  |  |  |
Equity Method Investments |  | 27,272 | 26,672 | 26,672 | $ 32,470 | 27,272 | 26,672 |
Engine Value |  |  |  |  | 100 |  |  |
Consolidated Statements of Income |  |  |  |  |  |  |  |
Revenue |  | 35,463 | 26,909 | 25,757 |  |  |  |
Expenses |  | 31,669 | 24,574 | 23,150 |  |  |  |
WMES net income |  | 3,794 | 2,335 | 2,607 |  |  |  |
Consolidated Balance Sheets |  |  |  |  |  |  |  |
Total assets |  |  |  |  | 293,299 | 256,126 |  |
Total liabilities |  |  |  |  | 219,881 | 195,258 |  |
Total WMES net equity |  |  |  |  | 73,418 | 60,868 |  |
WMES | Other Revenue |  |  |  |  |  |  |  |
Investments |  |  |  |  |  |  |  |
Management fees |  | 2,100 | 1,700 | 2,000 |  |  |  |
CASC Willis |  |  |  |  |  |  |  |
Investments |  |  |  |  |  |  |  |
Investment in WMES joint ventures at beginning of the period |  | 14,023 | 14,918 |  |  |  |  |
Earnings from joint venture |  | (219) | (99) |  |  |  |  |
Foreign Currency Translation Adjustment |  | 868 | (796) |  |  |  |  |
Investment in WMES joint ventures at end of the period |  | 12,936 | 14,023 | 14,918 |  |  |  |
Equity Method Investments |  | 14,023 | $ 14,918 | $ 14,918 | 12,936 | $ 14,023 | $ 14,918 |
CASC |  |  |  |  |  |  |  |
Investments |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  |  |  |  | 50.00%
Investment | $ 15,000 |  |  |  |  |  |  |
Investment in WMES joint ventures at end of the period |  | 12,900 |  |  |  |  |  |
Equity Method Investments |  | $ 12,900 |  |  | $ 12,900 |  |  |

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