Consolidated Statements of Cash Flows - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
OPERATING ACTIVITIES
Net income (loss)	$ 28,636,000	$ 27,155,000	$ (1,119,000)
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Stock-based compensation	5,379,000	5,273,000	4,815,000
Bond amortization and accretion	5,087,000	6,247,000	8,810,000
Amortization of original issuance discount on debt	1,419,000	3,885,000	2,314,000
Depreciation and amortization	10,436,000	27,070,000	7,742,000
Allowance for bad debt	290,300	0	0
Net realized loss (gain)	(1,734,000)	399,000	(564,000)
Net change in unrealized losses of equity securities	(2,429,000)	2,078,000
Change in fair value of option feature			41,013,000
Net loss on property held for sale		737,000
Net loss (gain) on repurchase of debt	48,000	9,790,000	1,203,000
Deferred income taxes, net of acquired	(898,000)	(21,563,000)	19,619,000
Changes in operating assets and liabilities:
Accrued investment income	91,000	589,000	303,000
Premiums receivable, net	(6,685,000)	10,757,000	(910,000)
Prepaid reinsurance premiums	8,969,000	(5,307,000)	16,223,000
Reinsurance premiums receivable and recoverable	(110,973,000)	39,427,000	(284,284,000)
Income taxes receivable	32,415,000	1,752,000	(28,598,000)
Deferred policy acquisition costs, net	(4,156,000)	(31,377,000)	1,101,000
Operating lease right-of-use assets	(6,645,000)
Other assets	(1,728,000)	8,972,000	(4,907,000)
Unpaid losses and loss adjustment expenses	181,174,000	(37,724,000)	236,142,000
Unearned premiums	13,863,000	(2,977,000)	(17,740,000)
Reinsurance payable	(10,624,000)	149,398,000	(79,106,000)
Accrued interest	175,000	(1,993,000)	3,217,000
Income taxes payable	12,624,000
Advance premiums	(3,496,000)	(7,251,000)	3,355,000
Accrued compensation	(3,879,000)	(3,648,000)	3,155,000
Operating lease liabilities	8,369,000
Other liabilities	(36,071,000)	(85,351,000)	75,705,000
Net cash provided by operating activities	119,657,000	96,338,000	7,489,000
INVESTING ACTIVITIES
Fixed maturity securities sales, maturities and paydowns	161,160,000	241,497,000	338,180,000
Fixed maturity securities purchases	(228,047,000)	(211,963,000)	(210,070,000)
Equity securities sales	26,766,000	4,820,000	11,726,000
Equity securities purchases	(4,583,000)	(5,992,000)	(5,774,000)
Other investment purchases	(24,250,000)	(1,716,000)
Proceeds from other investments sold	19,995,000
Acquisition of a business, net of cash acquired			(140,919,000)
Collection of (issued) promissory note receivable	358,000	(910,000)
Cost of property and equipment acquired	(4,984,000)	(2,281,000)	(385,000)
Net cash provided by (used in) investing activities	(53,585,000)	23,455,000	(7,242,000)
FINANCING ACTIVITIES
Proceeds from convertible notes			136,750,000
Proceeds from long-term debt		114,200,000
Repurchase of convertible notes	(2,869,000)	(52,739,000)	(25,189,000)
Debt acquisition costs		(3,431,000)	(5,609,000)
Proceeds from mortgage loan			12,658,000
Proceeds from exercise of stock options			417,000
Mortgage loan payments	(277,000)	(264,000)
Repayments of long-term debt	(15,625,000)	(79,500,000)
Tax withholding on share-based compensation awards	(3,521,000)	(1,839,000)	(1,599,000)
Purchase of treasury stock	(16,183,000)	(2,000,000)	(61,623,000)
Dividends	(6,959,000)	(6,380,000)	(8,249,000)
Net cash (used in) provided by financing activities	(45,434,000)	(31,953,000)	47,556,000
Increase in cash, cash equivalents, and restricted cash	20,638,000	87,840,000	47,803,000
Cash, cash equivalents and restricted cash, beginning of period	262,370,000	174,530,000	126,727,000
Cash, cash equivalents and restricted cash, end of period	283,008,000	262,370,000	174,530,000
Supplemental Cash Flows Information:
Income taxes paid, net	14,165,000	31,289,000	4,500,000
Interest paid	$ 7,298,000	$ 17,573,000	4,054,000
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Original issue discount on convertible notes			16,838,000
Issuance of shares on conversion of convertible notes		53,044
Issuance of shares for consideration in the acquisition of a business			$ 40,000,000