Restatement of Previously Issued Financial Statements Effects of the error corrections, immaterial accounting adjustments and reclassifications on the Company’s consolidated balance sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Oct. 12, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Fixed maturities, at fair value (amortized cost of $11,316 and $14,707, respectively)	$ 11,076		$ 14,541
Equity investments, at fair value (cost of $2,052 and $4,868, respectively)	1,577		4,589
Alternative Investment	31,564		32,211
Investments in private companies, at adjusted cost	4,615		4,870
Real estate investments, at fair value (cost $10,225 and $10,225, respectively)	10,662	$ 10,662	10,662		$ 10,662	$ 10,662	$ 10,662
Other investments, at cost which approximates fair value	3,316		3,721
Short-term investments, at cost which approximates fair value	151		151
Investments	68,277		79,839
Cash and cash equivalents	9,045		5,377
Restricted Cash	14,167		14,985
Investment in investee	2,827		5,230
Accrued investment income	359		507
Service fee receivable, net of allowance for doubtful accounts of $439 and $318, respectively	6,787		4,431
Other receivables, net of allowance for doubtful accounts of zero and zero, respectively	8,986		7,247
Deferred acquisition costs, net	6,899	$ 6,662	6,325		6,241	$ 6,054	$ 5,827
Property and equipment, net of accumulated depreciation of $14,875 and $11,683, respectively	104,196		108,008
Goodwill	74,659		80,843	$ 2,867
Intangible assets, net of accumulated amortization of $10,070 and $8,218, respectively	83,790		79,446
Other assets	2,560		4,302	206
Assets held for sale	112,034		110,145
Total assets	494,586		506,685	13,168
Accrued expenses and other liabilities	11,327		10,359	2,368
Income taxes payable	2,501		2,644
Deferred service fees	45,985		41,113
Unpaid loss and loss adjustment expenses	2,292		1,329		$ 1,494
Bank loan	4,167		4,917
Unsecured Debt	200,434		203,648
Subordinated debt, at fair value	53,614		52,105
Net deferred income tax liabilities	28,498		28,763
Liabilities held for sale	107,076		105,900
Total liabilities	455,894		450,778	$ 3,168
Redeemable Class A preferred stock, no par value; unlimited number authorized; 222,876 and 222,876 issued and outstanding at September 30, 2018 and December 31, 2017, respectively; redemption amount of $7,573 and $7,182 at September 30, 2018 and December 31, 2017, respectively	5,957		5,180
Additional paid-in capital	353,514		356,171
Accumulated deficit	(368,689)		(310,953)
Accumulated other comprehensive income (loss)	37,166		(3,852)
Stockholders' Equity Attributable to Parent	21,991		41,366
Noncontrolling interests in consolidated subsidiaries	10,744		9,361
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	32,735		50,727
Liabilities and Equity	494,586		506,685
Adjustments for Error Correction 1 [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Fixed maturities, at fair value (amortized cost of $11,316 and $14,707, respectively)	0		0
Equity investments, at fair value (cost of $2,052 and $4,868, respectively)	243		113
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	3,536		6,113
Alternative Investment	3,455		4,545
Investments in private companies, at adjusted cost	0		0
Real estate investments, at fair value (cost $10,225 and $10,225, respectively)	0		0
Other investments, at cost which approximates fair value	1,399		1,400
Short-term investments, at cost which approximates fair value	0		0
Investments	8,633		12,171
Cash and cash equivalents	0		0
Restricted Cash	0		0
Investment in investee	0		0
Accrued investment income	0		0
Service fee receivable, net of allowance for doubtful accounts of $439 and $318, respectively	0		0
Other receivables, net of allowance for doubtful accounts of zero and zero, respectively	0		0
Deferred acquisition costs, net	0		0
Property and equipment, net of accumulated depreciation of $14,875 and $11,683, respectively	0		0
Goodwill	0		0
Intangible assets, net of accumulated amortization of $10,070 and $8,218, respectively	0		0
Other assets	0		0
Assets held for sale	(8,633)		(12,171)
Total assets	0		0
Accrued expenses and other liabilities	0		0
Income taxes payable	0		0
Deferred service fees	0		0
Unpaid loss and loss adjustment expenses	0		0
Bank loan	0		0
Unsecured Debt	0		0
Subordinated debt, at fair value	0		0
Net deferred income tax liabilities	0		0
Liabilities held for sale	0		0
Total liabilities	0
Redeemable Class A preferred stock, no par value; unlimited number authorized; 222,876 and 222,876 issued and outstanding at September 30, 2018 and December 31, 2017, respectively; redemption amount of $7,573 and $7,182 at September 30, 2018 and December 31, 2017, respectively	0		0
Additional paid-in capital	0		0
Accumulated deficit	0		0
Accumulated other comprehensive income (loss)	0		0
Stockholders' Equity Attributable to Parent	0		0
Noncontrolling interests in consolidated subsidiaries	0		0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	0		0
Liabilities and Equity	0		0
Adjustments for Error Correction 2 [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Fixed maturities, at fair value (amortized cost of $11,316 and $14,707, respectively)	0		0
Equity investments, at fair value (cost of $2,052 and $4,868, respectively)	0		0
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	(3,710)		(1,091)
Alternative Investment	23,580		21,895
Investments in private companies, at adjusted cost	3,884		4,020
Real estate investments, at fair value (cost $10,225 and $10,225, respectively)	10,662		10,662
Other investments, at cost which approximates fair value	0		0
Short-term investments, at cost which approximates fair value	0		0
Investments			35,486
Cash and cash equivalents	456		310
Restricted Cash	0		0
Investment in investee	0		0
Accrued investment income	165		176
Service fee receivable, net of allowance for doubtful accounts of $439 and $318, respectively	0		0
Other receivables, net of allowance for doubtful accounts of zero and zero, respectively	53		(48)
Deferred acquisition costs, net	0		0
Property and equipment, net of accumulated depreciation of $14,875 and $11,683, respectively	0		0
Goodwill	0		0
Intangible assets, net of accumulated amortization of $10,070 and $8,218, respectively	0		0
Other assets	0		0
Assets held for sale	(12,698)		(14,136)
Total assets	22,392		21,788
Accrued expenses and other liabilities	425		432
Income taxes payable	0		0
Deferred service fees	0		0
Unpaid loss and loss adjustment expenses	0		0
Bank loan	0		0
Unsecured Debt	16,873		17,179
Subordinated debt, at fair value	0		0
Net deferred income tax liabilities	0		0
Liabilities held for sale	0		0
Total liabilities	17,298
Redeemable Class A preferred stock, no par value; unlimited number authorized; 222,876 and 222,876 issued and outstanding at September 30, 2018 and December 31, 2017, respectively; redemption amount of $7,573 and $7,182 at September 30, 2018 and December 31, 2017, respectively	0		0
Additional paid-in capital	0		0
Accumulated deficit	(399)		(51)
Accumulated other comprehensive income (loss)	205		0
Stockholders' Equity Attributable to Parent	(194)		(51)
Noncontrolling interests in consolidated subsidiaries	5,288		4,228
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	5,094		4,177
Liabilities and Equity	22,392		21,788
Adjustments for Error Correction 3 [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Fixed maturities, at fair value (amortized cost of $11,316 and $14,707, respectively)	0		0
Equity investments, at fair value (cost of $2,052 and $4,868, respectively)	0		0
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	0		0
Alternative Investment	0		0
Investments in private companies, at adjusted cost	0		0
Real estate investments, at fair value (cost $10,225 and $10,225, respectively)	0		0
Other investments, at cost which approximates fair value	0		0
Short-term investments, at cost which approximates fair value	0		0
Investments			0
Cash and cash equivalents	(14,167)		(14,985)
Restricted Cash	14,167		14,985
Investment in investee	0		0
Accrued investment income	0		0
Service fee receivable, net of allowance for doubtful accounts of $439 and $318, respectively	0		0
Other receivables, net of allowance for doubtful accounts of zero and zero, respectively	0		0
Deferred acquisition costs, net	0		0
Property and equipment, net of accumulated depreciation of $14,875 and $11,683, respectively	0		0
Goodwill	0		0
Intangible assets, net of accumulated amortization of $10,070 and $8,218, respectively	0		0
Other assets	0		0
Assets held for sale	0		0
Total assets	0		0
Accrued expenses and other liabilities	0		0
Income taxes payable	0		0
Deferred service fees	0		0
Unpaid loss and loss adjustment expenses	0		0
Bank loan	0		0
Unsecured Debt	0		0
Subordinated debt, at fair value	0		0
Net deferred income tax liabilities	0		0
Liabilities held for sale	0		0
Total liabilities	0
Redeemable Class A preferred stock, no par value; unlimited number authorized; 222,876 and 222,876 issued and outstanding at September 30, 2018 and December 31, 2017, respectively; redemption amount of $7,573 and $7,182 at September 30, 2018 and December 31, 2017, respectively	0		0
Additional paid-in capital	0		0
Accumulated deficit	0		0
Accumulated other comprehensive income (loss)	0		0
Stockholders' Equity Attributable to Parent	0		0
Noncontrolling interests in consolidated subsidiaries	0		0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	0		0
Liabilities and Equity	0		0
Immaterial Accounting Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Fixed maturities, at fair value (amortized cost of $11,316 and $14,707, respectively)	0		0
Equity investments, at fair value (cost of $2,052 and $4,868, respectively)	0		0
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	(740)		(850)
Alternative Investment	0		0
Investments in private companies, at adjusted cost	731		850
Real estate investments, at fair value (cost $10,225 and $10,225, respectively)	0		0
Other investments, at cost which approximates fair value	0		0
Short-term investments, at cost which approximates fair value	0		0
Investments	(9)		0
Cash and cash equivalents	(835)		(722)
Restricted Cash	0		0
Investment in investee	0		0
Accrued investment income	0		0
Service fee receivable, net of allowance for doubtful accounts of $439 and $318, respectively	40		145
Other receivables, net of allowance for doubtful accounts of zero and zero, respectively	1,056		759
Deferred acquisition costs, net	0		0
Property and equipment, net of accumulated depreciation of $14,875 and $11,683, respectively	0		0
Goodwill	731		731
Intangible assets, net of accumulated amortization of $10,070 and $8,218, respectively	(569)		(616)
Other assets	0		0
Assets held for sale	0		0
Total assets	414		297
Accrued expenses and other liabilities	(590)		(997)
Income taxes payable	0		0
Deferred service fees	(290)		(1,144)
Unpaid loss and loss adjustment expenses	0		0
Bank loan	0		0
Unsecured Debt	0		0
Subordinated debt, at fair value	0		0
Net deferred income tax liabilities	26		18
Liabilities held for sale	0		0
Total liabilities	(854)
Redeemable Class A preferred stock, no par value; unlimited number authorized; 222,876 and 222,876 issued and outstanding at September 30, 2018 and December 31, 2017, respectively; redemption amount of $7,573 and $7,182 at September 30, 2018 and December 31, 2017, respectively	471		(281)
Additional paid-in capital	(627)		150
Accumulated deficit	1,481		2,585
Accumulated other comprehensive income (loss)	0		0
Stockholders' Equity Attributable to Parent	854		2,735
Noncontrolling interests in consolidated subsidiaries	(57)		(34)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	797		2,701
Liabilities and Equity	414		297
Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Fixed maturities, at fair value (amortized cost of $11,316 and $14,707, respectively)	11,076		14,541
Equity investments, at fair value (cost of $2,052 and $4,868, respectively)	1,577		4,589
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	5,316		9,094
Alternative Investment	31,564		32,211
Investments in private companies, at adjusted cost	4,615		4,870
Real estate investments, at fair value (cost $10,225 and $10,225, respectively)	10,662		10,662
Other investments, at cost which approximates fair value	3,316		3,721
Short-term investments, at cost which approximates fair value	151		151
Investments	68,277		79,839
Cash and cash equivalents	9,045		5,377
Restricted Cash	14,167		14,985
Investment in investee	2,827		5,230
Accrued investment income	359		507
Service fee receivable, net of allowance for doubtful accounts of $439 and $318, respectively	6,787		4,431
Other receivables, net of allowance for doubtful accounts of zero and zero, respectively	8,986		7,247
Deferred acquisition costs, net	6,899		6,325
Property and equipment, net of accumulated depreciation of $14,875 and $11,683, respectively	104,196		108,008
Goodwill	74,659		80,843
Intangible assets, net of accumulated amortization of $10,070 and $8,218, respectively	83,790		79,446
Other assets	2,560		4,302
Assets held for sale	112,034		110,145
Total assets	494,586		506,685
Accrued expenses and other liabilities	11,327		10,359
Income taxes payable	2,501		2,644
Deferred service fees	45,985		41,113
Unpaid loss and loss adjustment expenses	2,292		1,329
Bank loan	4,167		4,917
Unsecured Debt	200,434		203,648
Subordinated debt, at fair value	53,614		52,105
Net deferred income tax liabilities	28,498		28,763
Liabilities held for sale	107,076		105,900
Total liabilities	455,894
Redeemable Class A preferred stock, no par value; unlimited number authorized; 222,876 and 222,876 issued and outstanding at September 30, 2018 and December 31, 2017, respectively; redemption amount of $7,573 and $7,182 at September 30, 2018 and December 31, 2017, respectively	5,957		5,180
Additional paid-in capital	353,514		356,171
Accumulated deficit	(368,689)		(310,953)
Accumulated other comprehensive income (loss)	37,166		(3,852)
Stockholders' Equity Attributable to Parent	21,991		41,366
Noncontrolling interests in consolidated subsidiaries	10,744		9,361
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	32,735		50,727
Liabilities and Equity	494,586		506,685
Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Fixed maturities, at fair value (amortized cost of $11,316 and $14,707, respectively)	11,076		14,541
Equity investments, at fair value (cost of $2,052 and $4,868, respectively)	1,334		4,476
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	6,230		4,922
Alternative Investment	4,529		5,771
Investments in private companies, at adjusted cost	0		0
Real estate investments, at fair value (cost $10,225 and $10,225, respectively)	0		0
Other investments, at cost which approximates fair value	1,917		2,321
Short-term investments, at cost which approximates fair value	151		151
Investments	25,237		32,182
Cash and cash equivalents	23,591		20,774
Restricted Cash	0		0
Investment in investee	2,827		5,230
Accrued investment income	194		331
Service fee receivable, net of allowance for doubtful accounts of $439 and $318, respectively	6,747		4,286
Other receivables, net of allowance for doubtful accounts of zero and zero, respectively	7,877		6,536
Deferred acquisition costs, net	6,899		6,325
Property and equipment, net of accumulated depreciation of $14,875 and $11,683, respectively	104,196		108,008
Goodwill	73,928		80,112
Intangible assets, net of accumulated amortization of $10,070 and $8,218, respectively	84,359		80,062
Other assets	2,560		4,302
Assets held for sale	133,365		136,452
Total assets	471,780		484,600
Accrued expenses and other liabilities	11,492		10,924
Income taxes payable	2,501		2,644
Deferred service fees	46,275		42,257
Unpaid loss and loss adjustment expenses	2,292		1,329
Bank loan	4,167		4,917
Unsecured Debt	183,561		186,469
Subordinated debt, at fair value	53,614		52,105
Net deferred income tax liabilities	28,472		28,745
Liabilities held for sale	107,076		105,900
Total liabilities	439,450
Redeemable Class A preferred stock, no par value; unlimited number authorized; 222,876 and 222,876 issued and outstanding at September 30, 2018 and December 31, 2017, respectively; redemption amount of $7,573 and $7,182 at September 30, 2018 and December 31, 2017, respectively	5,486		5,461
Additional paid-in capital	354,141		356,021
Accumulated deficit	(369,771)		(313,487)
Accumulated other comprehensive income (loss)	36,961		(3,852)
Stockholders' Equity Attributable to Parent	21,331		38,682
Noncontrolling interests in consolidated subsidiaries	5,513		5,167
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	26,844		43,849
Liabilities and Equity	$ 471,780		$ 484,600