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Shareholders' Equity - Preferred Units of Limited Partnership (Details) - Series A Cumulative Preferred Units
$ / shares in Units, $ in Thousands
May 01, 2018
USD ($)
$ / shares
shares
Class of Stock [Line Items]  
Shares outstanding (in units) | shares 1,813,504
Redemption percentage 5.50%
Redemption price (in dollars per share) | $ / shares $ 11.15
Redemption amount | $ $ 20,310