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Equity - Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands							3 Months Ended		6 Months Ended
	Jul. 15, 2019	May 24, 2019	Apr. 19, 2019	Mar. 21, 2019	Jan. 16, 2019	Dec. 06, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Class of Stock [Line Items]
Cash dividends declared (in dollars per share)		$ 0.04		$ 0.04		$ 0.04	$ 0.04	$ 0	$ 0.08	$ 0
Cash dividends declared		$ 6,233		$ 5,896		$ 5,838
Exchangeable Shares
Class of Stock [Line Items]
Cash dividends paid (in dollars per share)			$ 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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Aggregate dividends paid during the period for each share of common stock outstanding.

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-Publisher FASB
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-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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Aggregate dividends declared during the period for each share of common stock outstanding.

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