Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Investments
Fixed maturities, available-for-sale, at fair value (amortized cost, $3,666,295 and $2,361,575, respectively; allowance for expected credit losses, none as of June 30, 2021 and $552 as of December 31, 2020)	$ 3,734,655	$ 2,457,531
Fixed maturities, trading, at fair value (cost, $46,167 and $47,907, respectively)	45,957	48,456
Equity investments, at fair value (cost, $229,055 and $113,709, respectively)	234,211	120,101
Short-term investments	351,885	337,813
Business owned life insurance	80,198	67,847
Investment in unconsolidated subsidiaries	314,892	310,529
Other investments (at fair value, $106,895 and $44,116, respectively, otherwise at cost or amortized cost)	110,052	47,068
Total Investments	4,871,850	3,389,345
Cash and cash equivalents	160,796	215,782
Premiums receivable, net	288,589	201,395
Receivable from reinsurers on paid losses and loss adjustment expenses	16,280	14,370
Receivable from reinsurers on unpaid losses and loss adjustment expenses	484,059	385,087
Prepaid reinsurance premiums	39,261	35,885
Deferred policy acquisition costs	52,102	47,196
Deferred tax asset, net	110,785	57,105
Real estate, net	30,722	30,529
Operating lease ROU assets	21,670	19,013
Intangible assets, net	76,574	65,720
Goodwill	49,610	49,610
Other assets	155,889	143,766
Total Assets	6,358,187	4,654,803
Policy liabilities and accruals
Reserve for losses and loss adjustment expenses	3,621,831	2,417,179
Unearned premiums	498,653	361,547
Reinsurance premiums payable	45,178	39,998
Total Policy Liabilities	4,165,662	2,818,725
Operating lease liabilities	23,499	20,116
Other liabilities	286,123	182,039
Debt less unamortized debt issuance costs	458,863	284,713
Total Liabilities	4,934,147	3,305,593
Shareholders' Equity
Common shares (par value $0.01 per share, 100,000,000 shares authorized, 63,306,684 and 63,217,708 shares issued, respectively)	633	632
Additional paid-in capital	390,748	388,150
Accumulated other comprehensive income (loss) (net of deferred tax expense (benefit) of $14,278 and $19,386, respectively)	53,072	75,227
Retained earnings	1,395,549	1,301,163
Treasury shares, at cost (9,325,180 shares as of each respective period end)	(415,962)	(415,962)
Total Shareholders' Equity	1,424,040	1,349,210
Total Liabilities and Shareholders' Equity	$ 6,358,187	$ 4,654,803