Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Activities:
Net Income	$ 62,982	$ 41,612
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation & Amortization	1,578	2,411
Share-Based Compensation	5,971	9,146
Deferred Income Taxes	(736)	(10,793)
Total Net Realized and Unrealized Gains	(1,104)	(2,743)
Net Other-Than-Temporary Impairments Recognized in Earnings	0	1,093
Changes in Assets And Liabilities:
Reinsurance Recoverable on Paid and Unpaid Losses and Loss Adjustment Expenses	5,777	13,107
Reserves for Losses and Loss Adjustment Expenses	27,567	52,063
Prepaid Reinsurance Premiums	(8,629)	(24,982)
Unearned Premiums	127,861	115,511
Premiums Receivable	(106,326)	(116,689)
Deferred Policy Acquisition Costs	(21,991)	(13,137)
Accrued Investment Income	(805)	(881)
Reinsurance Balances Payable	(3,789)	16,145
Current Income Tax Receivable, Net	(4,870)	7,175
Other	(765)	(16,134)
Net Cash Provided by Operating Activities	82,721	72,904
Fixed Maturities
Redemptions and Maturities	258,931	165,690
Sales	271,804	95,240
Purchases	(499,956)	(356,970)
Equity Securities
Sales		39,487
Sales	28,757
Purchases		(21,022)
Purchases	(76,419)
Net Sales and Purchases of Other Invested Assets	(8,591)	(10,105)
Net Sales, Maturities and Purchases of Short-Term Investments	32	(171)
Net Change in Unsettled Security Transactions	43,475	12,028
Purchase of Subsidiaries, Net of Acquired Cash	(22,383)	0
Net Purchase of Property and Equipment	(3,841)	(2,098)
Net Cash Used in Investing Activities	(8,191)	(77,921)
Financing Activities:
Proceeds from Employee Stock Purchase Plan	969	1,147
Payment of Employee Tax Withholding on Stock Compensation	(7,786)	(13,189)
Dividends Paid	(4,151)	(3,092)
Net Cash Used in Financing Activities	(10,968)	(15,134)
Effect of Exchange Rate on Unrestricted and Restricted Cash and Cash Equivalents	830	1,805
Change in Unrestricted and Restricted Cash and Cash Equivalents	64,392	(18,346)
Unrestricted and Restricted Cash and Cash Equivalents at Beginning of Year	158,964	172,846
Unrestricted and Restricted Cash and Cash Equivalents at End of Period	223,356	154,500
Supplemental Information:
Income Taxes Paid, Net	19,349	21,445
Interest Paid	7,619	7,619
Issuance of Stock to Directors	$ 783	$ 578