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Equity - Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands									3 Months Ended		9 Months Ended
	Oct. 15, 2019	Aug. 28, 2019	Jul. 15, 2019	May 24, 2019	Apr. 19, 2019	Mar. 21, 2019	Jan. 16, 2019	Dec. 06, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Class of Stock [Line Items]
Cash dividends declared (in dollars per share)		$ 0.04		$ 0.04		$ 0.04		$ 0.04	$ 0.04	$ 0	$ 0.12	$ 0
Cash dividends declared		$ 5,564		$ 6,233		$ 5,896		$ 5,838
Exchangeable Shares
Class of Stock [Line Items]
Cash dividends paid (in dollars per share)			$ 0.04		$ 0.04		$ 0.04
Exchangeable Shares | Subsequent Event
Class of Stock [Line Items]
Cash dividends paid (in dollars per share)	$ 0.04

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-Publisher FASB
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-Topic 505
-SubTopic 10
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