Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 100,573	$ 85,339
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Net (gain) loss on investments	6,861	(22)
Credit loss expense	25,766	20,967
Depreciation and amortization	21,278	27,135
Stock-based compensation expense	3,162	2,622
Other, net	6,483	(1,251)
Changes in assets and liabilities:
Accrued investment income	4,020	658
Premiums and other receivables	(139,339)	(228,239)
Deferred acquisition costs	(13,846)	(17,020)
Reinsurance recoverable	(7,889)	121,500
Prepaid reinsurance premiums	64,099	28,058
Prepaid expenses and other assets	8,551	82,591
Unpaid loss and loss adjustment expense reserves	(38,221)	(83,073)
Unearned premiums and other revenue	64,134	161,680
Reinsurance payable	(8,862)	(130,353)
Accounts payable and accrued expenses	6,623	9,458
Other liabilities	40,656	35,160
Net cash provided by operating activities	144,049	115,210
Cash flows from investing activities:
Purchases of debt securities, available-for-sale	(90,283)	(94,525)
Purchases of short-term investments	(194,423)	(678,000)
Purchases of other investments	(2,579)	(110)
Purchases of property and equipment	(9,818)	(57,622)
Proceeds from sale of debt securities, available-for-sale	25,566	21,066
Proceeds from maturities of debt securities, available-for-sale	111,439	62,072
Proceeds from sale of short-term investments	191,188	637,682
Proceeds from sale and return of other investments	20,694	2,805
Net cash provided by (used in) investing activities	51,784	(106,632)
Cash flows from financing activities:
Payments of debt issuance costs	0	(1,726)
Repayments of debt and principal payments under capital leases obligations	(3,112)	(3,034)
Issuance of common stock — employee share options	388	93
Taxes paid related to net share settlement of equity awards	(3,106)	(2,435)
Dividends paid to common shareholders	(5,669)	(4,518)
Dividends paid to preferred shareholders	(8,925)	(8,867)
Net cash used in financing activities	(20,424)	(20,487)
Effect of exchange rate changes on cash and cash equivalents	0	(1,402)
Net increase (decrease) in cash, cash equivalents, and restricted cash	175,409	(13,311)
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	339,872	220,272
Common stock
Dividends Payable
Dividends Payable	5,686	4,524
Preferred stock
Dividends Payable
Dividends Payable	$ 7,875	$ 7,875