Schedule II Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Income Statements, Captions [Line Items]
Net investment income									$ 10,679	$ 9,212	$ 6,795
Total revenue									487,117	357,569	280,230
Operating Expenses									20,524	15,316	11,746
General and Administrative Expense									42,956	29,852	20,007
Interest Expense									723	326	410
Total expenses									480,214	316,003	215,897
Operating Income (Loss)									6,903	41,566	64,333
Other Nonoperating Income (Expense)									100	294	77
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									(7,003)	(41,860)	(64,410)
Income Tax Expense (Benefit)									1,305	14,502	23,397
Net income	$ (10,517)	$ 3,423	$ 9,841	$ 2,951	$ 13,802	$ 8,083	$ 5,275	$ 198	5,698	27,358	41,013
Change in net unrealized gain on investments									(629)	(3,070)	6,367
Reclassification adjustment for net realized investment gains									(547)	(827)	20
Income tax expense related to items of other comprehensive income									378	1,506	(2,468)
Total comprehensive income									4,900	24,967	44,932
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Income (Loss) from Subsidiaries, Net of Tax									13,296	27,562	40,108
Realized Investment Gains (Losses)									(14)	951	0
Net investment income									88	239	0
Total revenue									13,370	28,752	40,108
Operating Expenses									337	138	86
General and Administrative Expense									11,805	1,252	130
Interest Expense									496	0	0
Total expenses									12,638	1,390	216
Operating Income (Loss)									732	27,362	39,892
Other Nonoperating Income (Expense)									60	245	61
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									(792)	(27,607)	(39,953)
Income Tax Expense (Benefit)									(4,906)	249	(1,060)
Net income									5,698	27,358	41,013
Change in net unrealized gain on investments									(1,191)	25	0
Reclassification adjustment for net realized investment gains									14	(951)	0
Income tax expense related to items of other comprehensive income									378	(357)	0
Total comprehensive income									$ 4,899	$ 26,075	$ 41,013