Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 4,074	$ 5,343
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization expense	948	1,136
Deferred federal income taxes	280	(819)
Net realized (gains) losses	227	(584)
Share-based payments expense	139	371
Change in ceded unearned premiums	(1,840)	(1,747)
Change in premiums receivable	(6,868)	(11,121)
Change in accounts receivable	(397)	1,302
Change in deferred policy acquisition costs	(371)	(384)
Change in unpaid losses and loss adjustment expenses	(1,749)	7,470
Change in unearned premiums	5,139	5,425
Change in reinsurance recoverable	(5,874)	(579)
Change in reinsurance balances payable	4,188	3,528
Change in current federal income tax payable	1,451	2,445
Change in all other liabilities	277	(6,430)
Change in all other assets	(935)	(1,647)
Net cash (used in) provided by operating activities	(1,311)	3,709
Cash flows from investing activities:
Purchases of property and equipment	(225)	(456)
Net transfers (into) from restricted cash	(211)	2,111
Purchases of investment securities	(58,384)	(26,735)
Maturities, sales and redemptions of investment securities	34,455	20,923
Net cash used in investing activities	(24,365)	(4,157)
Cash flows from financing activities:
Proceeds from exercise of employee stock options		202
Purchase of treasury shares	(1,293)	(288)
Net cash used in financing activities	(1,293)	(86)
Decrease in cash and cash equivalents	(26,969)	(534)
Cash and cash equivalents at beginning of period	114,446	130,985
Cash and cash equivalents at end of period	87,477	130,451
Supplemental cash flow information:
Interest paid	1,131	1,140
Income taxes paid	184	720
Supplemental schedule of non-cash investing activities:
Change in receivable for securities related to investment disposals that settled after the balance sheet date	9,486	(359)
Change in payable for securities related to investment purchases that settled after the balance sheet date	$ 1,813	$ 13,203

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Name:	us-gaap_RealizedInvestmentGainsLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration