Schedule I Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Net Income (Loss) Attributable to Parent	$ 353,526	$ (5,785)	$ 127,669
Share based compensation	5,641	5,399	12,048
Other assets	3,799	2,194	(2,814)
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(1,311,391)	(395,446)	(215,721)
Issuance (redemption) of common shares	192,861	(7,410)	0
Payments of Ordinary Dividends, Common Stock	135,557	84,752	0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	523,429	(32,233)	(242,501)
Cash and cash equivalents	132,031	113,198	56,689	$ 65,607
Triton International Limited Holdings [Domain]
Condensed Financial Statements, Captions [Line Items]
Net Income (Loss) Attributable to Parent	344,598	(13,517)
Income (Loss) from Subsidiaries, before Tax	348,609	(2,535)
Share based compensation	1,084	0
Other assets	2,622	0
Noncash Merger Related Costs	(305)	(10,982)
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	0	0
Issuance (redemption) of common shares	192,931	0
Capital contribution to subsidiaries	(254,240)	0
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries	197,171	77,376
Payments of Ordinary Dividends, Common Stock	135,557	66,394
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	305	10,982
Cash and Cash Equivalents, Period Increase (Decrease)		0	0
Cash and cash equivalents	$ 0	$ 0	$ 0