CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net loss	$ (6,449)	$ (5,809)	$ (15,782)	$ (15,021)
Adjustments to reconcile net loss to net cash provided by operating activities:
Equity in losses of unconsolidated entities	251	327	156	1,593
Gain on sale of equipment, net	(4,996)	(1,999)	(4,991)	(4,017)
Security deposits and maintenance claims included in earnings			(4,325)	0
Loss on extinguishment of debt	0	0	0	2,456
Equity-based compensation	229	443	437	530
Depreciation and amortization	32,844	20,221	62,431	37,598
Change in current and deferred income taxes			564	80
Change in fair value of non-hedge derivative	441	0	(182)	0
Amortization of lease intangibles and incentives			12,943	3,291
Amortization of deferred financing costs	1,332	931	2,483	2,064
Bad debt expense	80	32	1,521	63
Other			21	331
Change in:
Accounts receivable			(10,064)	(6,268)
Other assets			(10,318)	9,909
Accounts payable and accrued liabilities			22,091	1,871
Management fees payable to affiliate			(668)	(578)
Other liabilities			2,835	(627)
Net cash provided by operating activities			59,152	33,275
Cash flows from investing activities:
Investment in notes receivable			(912)	0
Investment in unconsolidated entities and available for sale securities			(1,115)	(21,172)
Principal collections on finance leases			539	225
Acquisition of leasing equipment			(205,819)	(224,070)
Acquisition of property, plant and equipment			(124,039)	(50,688)
Acquisition of lease intangibles			(2,225)	(197)
Purchase deposits for acquisitions			(17,890)	(5,725)
Proceeds from sale of leasing equipment			26,499	30,241
Proceeds from sale of property, plant and equipment			31	51
Proceeds from deposit on sale of leasing equipment			240	2,505
Return of deposit on sale of engine			(400)	0
Net cash used in investing activities			(325,091)	(268,830)
Cash flows from financing activities:
Proceeds from debt			204,350	243,911
Repayment of debt			(45,874)	(11,875)
Payment of deferred financing costs			(1,819)	(2,722)
Receipt of security deposits			3,748	4,590
Return of security deposits			(805)	(1,657)
Receipt of maintenance deposits			22,355	9,975
Release of maintenance deposits			(4,276)	(6,111)
Proceeds from issuance of common shares, net of underwriter's discount			128,450	0
Common shares issuance costs			(789)	0
Purchase of non-controlling interest shares			(3,700)		$ 0
Cash dividends			(54,662)	(50,024)
Net cash provided by financing activities			246,978	186,087
Net increase in cash and cash equivalents and restricted cash			(18,961)	(49,468)
Cash and cash equivalents and restricted cash, beginning of period			92,806	133,496
Cash and cash equivalents and restricted cash, end of period	$ 73,845	$ 84,028	73,845	84,028	$ 133,496
Supplemental disclosure of non-cash investing and financing activities:
Proceeds from borrowings of debt			511	108,089
Repayment and settlement of debt			0	(100,000)
Acquisition of leasing equipment			(4,704)	(20,834)
Acquisition of property, plant and equipment			(3,621)	(30,915)
Settled and assumed security deposits			650	1,467
Billed, assumed and settled maintenance deposits			(1,427)	4,634
Deferred financing costs			0	(7,837)
Non-cash contribution from non-controlling interest			0	1,201
Transfer of non-controlling interest			7,225	0
Issuance of common shares			$ 301	$ 160