Fair Value of Financial instruments (Details 2)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	May 22, 2013 USD ($)	Jul. 14, 2005 CAD	Jan. 23, 2004 USD ($)	Dec. 31, 2013 Senior Notes [Member] USD ($)	Dec. 31, 2013 Short-term Investments [Member] USD ($)	Dec. 31, 2014 Foreign Government Debt Securities [Member] USD ($)	Dec. 31, 2013 Foreign Government Debt Securities [Member] USD ($)	Dec. 31, 2014 Liability [Member] USD ($)	Dec. 31, 2013 Liability [Member] USD ($)	Dec. 31, 2014 Common Stock [Member] USD ($)	Dec. 31, 2014 Warrant [Member] USD ($)	Dec. 31, 2014 Corporate Debt Securities [Member] USD ($)	Dec. 31, 2013 Corporate Debt Securities [Member] USD ($)	Dec. 31, 2014 Asset-backed Securities [Member] USD ($)	Dec. 31, 2013 Asset-backed Securities [Member] USD ($)	Dec. 31, 2014 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] USD ($)	Dec. 31, 2013 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] USD ($)	Dec. 31, 2014 Debt, State Government [Member] USD ($)	Dec. 31, 2013 Debt, State Government [Member] USD ($)	Dec. 31, 2014 US Government Agencies Debt Securities [Member] USD ($)	Dec. 31, 2013 US Government Agencies Debt Securities [Member] USD ($)	Dec. 31, 2014 Fair Value, Inputs, Level 1 [Member] USD ($)	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] USD ($)	Dec. 31, 2014 Summary of Investments, by Type [Domain] USD ($)	Dec. 31, 2013 Summary of Investments, by Type [Domain] USD ($)	Dec. 31, 2014 Other Investments [Member] USD ($)	Dec. 31, 2013 Other Investments [Member] USD ($)	Dec. 31, 2014 Fair Value, Inputs, Level 3 [Member] USD ($)	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] USD ($)	Dec. 31, 2014 Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2013 Subordinated Debt [Member] USD ($)	Dec. 31, 2014 Asset-backed Securities, Securitized Loans and Receivables [Member] USD ($)	Dec. 31, 2013 Asset-backed Securities, Securitized Loans and Receivables [Member] USD ($)	Dec. 31, 2014 US States and Political Subdivisions Debt Securities [Member] USD ($)	Dec. 31, 2013 US States and Political Subdivisions Debt Securities [Member] USD ($)	Dec. 31, 2014 Foreign Government Debt Securities [Member] USD ($)	Dec. 31, 2013 Foreign Government Debt Securities [Member] USD ($)	Dec. 31, 2014 US Government Agencies Debt Securities [Member] USD ($)	Dec. 31, 2013 US Government Agencies Debt Securities [Member] USD ($)	Dec. 31, 2014 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] USD ($)	Dec. 31, 2013 Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] USD ($)	Dec. 31, 2014 Corporate Debt Securities [Member] USD ($)	Dec. 31, 2013 Corporate Debt Securities [Member] USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 56,195,000	$ 54,151,000						$ 4,242,000	$ 4,082,000					$ 15,209,000	$ 19,500,000	$ 7,214,000	$ 3,994,000	$ 5,352,000	$ 2,006,000	$ 3,419,000	$ 6,231,000	$ 20,759,000	$ 18,338,000												$ 7,214,000	$ 3,994,000	$ 3,419,000	$ 6,231,000	$ 4,242,000	$ 4,082,000	$ 20,759,000	$ 18,338,000	$ 5,352,000	$ 2,006,000	$ 15,209,000	$ 19,500,000
Financial Instruments, Owned, Corporate Debt, at Fair Value																								0	0					0	0
Financial Instruments, Owned, Mortgages, Mortgage-backed and Asset-backed Securities, at Fair Value																								0	0					0	0
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure																								0	0					0	0
Municipal Debt Securities, at Carrying Value																								0	0					0	0
Financial Instruments, Owned, Other Sovereign Government Obligations, at Fair Value																								0	0					0	0
Financial Instruments, Owned, US Government and Agency Obligations, at Fair Value																								0	0					0	0
Available-for-sale Securities, Debt Securities	56,195,000	54,151,000
Common Stock, Value, Outstanding												19,526,000
Warrants Not Settleable in Cash, Fair Value Disclosure													92,000
Available-for-sale Securities, Equity Securities	19,618,000	7,137,000																						19,618,000	7,137,000
Other Investments	3,576,000	3,000,000																						0	0			3,576,000	3,000,000		0
Short-term Investments	400,000	501,000					501,000																		0						0
Investments	87,083,000	69,195,000																								79,789,000	64,789,000
Assets	301,722,000	324,639,000	1,624,000																					19,618,000	7,137,000							60,171,000	57,652,000
Subordinated Debt	40,659,000	28,471,000																						0	0					0	0
Senior Notes	0	14,356,000			100,000,000	14,356,000																			0						0
Debt Instrument, Face Amount	13,618,000	14,854,000		78,000,000																											0		0	14,854,000
Contingent Consideration Classified as Equity, Fair Value Disclosure	3,121,000	5,344,000																												3,121,000	5,344,000
Long-term Debt	$ 54,277,000	$ 57,681,000								$ 57,398,000	$ 63,025,000													$ 13,618,000						$ 3,121,000	$ 5,344,000	$ 40,659,000	$ 42,827,000