Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Activities:
Net Income	$ 30,878	$ 21,110
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation & Amortization	807	1,184
Share-Based Compensation	986	4,467
Deferred Income Taxes	(5)	(8,598)
Total Net Realized and Unrealized Gains	2,012	44
Changes in Assets And Liabilities:
Reinsurance Recoverable on Paid and Unpaid Losses and Loss Adjustment Expenses	9,382	(9,593)
Reserves for Losses and Loss Adjustment Expenses	6,353	41,664
Prepaid Reinsurance Premiums	(237)	(11,186)
Unearned Premiums	70,755	62,139
Premiums Receivable	(61,403)	(74,566)
Deferred Policy Acquisition Costs	(16,328)	(6,539)
Accrued Investment Income	(1,247)	(792)
Reinsurance Balances Payable	(7,468)	9,187
Current Income Tax Receivable, Net	6,251	19,098
Other	(4,973)	(10,276)
Net Cash Provided by Operating Activities	35,763	37,343
Fixed Maturities
Redemptions and Maturities	175,867	86,049
Sales	110,089	34,973
Purchases	(246,359)	(175,679)
Equity Securities
Sales		13,316
Sales	14,989
Purchases		(11,492)
Purchases	(36,799)
Net Sales and Purchases of Other Invested Assets	(4,585)	(2,570)
Net Sales, Maturities and Purchases of Short-Term Investments	22	(1,546)
Net Change in Unsettled Security Transactions	21,581	6,757
Net Purchase of Property and Equipment	(1,150)	(956)
Net Cash Provided by (Used in) Investing Activities	33,655	(51,148)
Financing Activities:
Proceeds from Employee Stock Purchase Plan	452	1,147
Payment of Employee Tax Withholding on Stock Compensation	(5,508)	(10,295)
Dividends Paid	(2,069)	(1,324)
Net Cash Used in Financing Activities	(7,125)	(10,472)
Effect of Exchange Rate on Unrestricted and Restricted Cash and Cash Equivalents	2,876	887
Change in Unrestricted and Restricted Cash and Cash Equivalents	65,169	(23,390)
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	224,133	149,456
Supplemental Information:
Income Taxes Paid, Net	294	136
Interest Paid	0	0
Issuance of Stock to Directors	$ 783	$ 578