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CONSOLIDATED STATEMENTS OF COMPRHENSIVE INCOME - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]    
Consolidated net income attributable to common stockholders $ 7,330 $ 7,665
Other comprehensive income/(loss):    
Net unrealized gain/(loss) on investments, net of non-controlling interest 397 (110)
Income tax expense related to items of other comprehensive income 0 0
Comprehensive income $ 7,727 $ 7,555