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Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Statement of Cash Flows [Abstract]    
Proceeds from sale and transfer of investment properties, net $ 119,825 $ 28,474
Income tax refunds $ 8 $ 50