Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 392,055	$ 222,636
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Net (gain) loss on investments	(18,136)	3,627
Credit loss expense	71,166	61,334
Depreciation and amortization	60,760	87,055
Stock-based compensation expense	9,336	8,277
Other, net	16,971	(1,013)
Changes in assets and liabilities:
Accrued investment income	3,237	(195)
Premiums and other receivables	(223,944)	(172,034)
Deferred acquisition costs	(21,440)	(17,397)
Reinsurance recoverable	106,646	118,763
Prepaid reinsurance premiums	116,786	29,372
Prepaid expenses and other assets	28,021	81,324
Unpaid loss and loss adjustment expense reserves	11,050	(14,165)
Unearned premiums and other revenue	25,228	93,853
Reinsurance payable	(160,416)	16,361
Accounts payable and accrued expenses	38,673	(578)
Other liabilities	(4,673)	(7,766)
Net cash provided by operating activities	451,320	509,454
Cash flows from investing activities:
Purchases of debt securities, available-for-sale	(661,632)	(863,050)
Purchases of short-term investments	(1,647,160)	(2,328,055)
Purchases of other investments	(2,579)	(4,554)
Purchases of property and equipment	(25,833)	(84,285)
Proceeds from sale of debt securities, available-for-sale	348,249	273,561
Proceeds from maturities of debt securities, available-for-sale	456,990	244,609
Proceeds from sale of short-term investments	1,206,569	2,293,700
Proceeds from sale and return of other investments	24,597	13,339
Other investing activities	(700)	16,128
Net cash used in investing activities	(301,499)	(438,607)
Cash flows from financing activities:
Common stock repurchased	(8,482)	0
Repayments of debt and principal payments under capital leases obligations	(10,032)	(29,826)
Issuance of common stock — employee share options	1,970	436
Taxes paid related to net share settlement of equity awards	(3,647)	(3,633)
Dividends paid to common shareholders	(17,025)	(13,573)
Dividends paid to preferred shareholders	(25,725)	(25,667)
Other Additional Capital	0	(1,726)
Net cash used in financing activities	(62,941)	(73,989)
Effect of exchange rate changes on cash and cash equivalents	0	(3,119)
Net increase (decrease) in cash, cash equivalents, and restricted cash	86,880	(6,261)
Cash, cash equivalents, and restricted cash at beginning of the period	164,463	233,583
Cash, cash equivalents, and restricted cash at end of the period	251,343	227,322
Common stock
Dividends Payable
Dividends Payable	5,673	5,664
Preferred stock
Dividends Payable
Dividends Payable	$ 7,875	$ 7,875