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Equity Method Investments - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended
	Feb. 20, 2019	Feb. 20, 2018	Mar. 31, 2019	Mar. 31, 2018	Apr. 01, 2010
Equity Method Investments
Return of capital from equity method investments			$ 2,848	$ 2,737
Income (loss) from equity method investments			$ 713	888
Corporate Joint Venture
Equity Method Investments
Ownership percentage			33.00%		50.00%
Return of capital from equity method investments	$ 2,848	$ 2,737
Income (loss) from equity method investments			$ 713	$ 888
Corporate Joint Venture \| Australian Trust
Equity Method Investments
Ownership percentage					50.00%

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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