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CONSOLIDATED STATEMENTS OF COMPRHENSIVE INCOME - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Statement of Comprehensive Income [Abstract]        
Consolidated net income attributable to common stockholders $ 6,242 $ 13,027 $ 6,642 $ 20,357
Other comprehensive income:        
Net unrealized gain/(loss) on investments in available-for-sale debt securities 23,231 710 (5,213) 1,107
Income tax expense related to items of other comprehensive income 0 0 0 0
Comprehensive income $ 29,473 $ 13,737 $ 1,429 $ 21,464