Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Term loans, fair value option, amortized cost	$ 991,130	$ 1,113,212
Fixed maturities, fair value option, amortized cost	611,265	432,576
Short term investments, fair value option, amortized cost	370,976	325,542
Fixed maturities, available for sale, amortized cost	$ 698,897	$ 739,456
Common shares, par value	$ 0.01	$ 0.01
Common shares, authorized	120,000,000	120,000,000
Common shares, issued	22,804,128	22,692,300
Common shares, held in treasury	2,917,149	2,789,405

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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