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Equity - Summary of Cash Dividends (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dividend Declared for Q1    
Dividends Payable [Line Items]    
Declaration Date Mar. 31, 2016 Mar. 31, 2015
Holders of Record Date Mar. 31, 2016 Mar. 31, 2015
Payment/Accrual Date Apr. 15, 2016 Apr. 15, 2015
Total Dividend $ 988 $ 1,021
Dividend Declared for Q2    
Dividends Payable [Line Items]    
Declaration Date Jun. 30, 2016 Jun. 30, 2015
Holders of Record Date Jun. 30, 2016 Jun. 30, 2015
Payment/Accrual Date Jul. 15, 2016 Jul. 15, 2015
Total Dividend $ 988 $ 1,020
Dividend Declared for Q3    
Dividends Payable [Line Items]    
Declaration Date Sep. 30, 2016 Sep. 30, 2015
Holders of Record Date Sep. 30, 2016 Sep. 30, 2015
Payment/Accrual Date Oct. 15, 2015 Oct. 15, 2015
Total Dividend $ 800 $ 1,020
Dividend Declared for Q4    
Dividends Payable [Line Items]    
Declaration Date Dec. 31, 2016 Dec. 31, 2015
Holders of Record Date Dec. 31, 2016 Dec. 31, 2015
Payment/Accrual Date Jan. 15, 2017 Jan. 15, 2016
Total Dividend $ 563 $ 1,005