Other Intangible Assets Level 4 Other Intangible Assets, Carrying Values and Amortization Periods (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 73,454	$ 46,831
Accumulated Amortization	(18,989)	(14,036)
Net Carrying Amount	54,465	32,795
Customer and Agent Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	57,780	34,552
Accumulated Amortization	(12,340)	(8,724)
Net Carrying Amount	45,440	25,828
Software [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,118	8,773
Accumulated Amortization	(3,385)	(2,345)
Net Carrying Amount	6,733	6,428
Present Value of Future Profits [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	548	548
Accumulated Amortization	(548)	(548)
Net Carrying Amount	0	0
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,008	2,958
Accumulated Amortization	(2,716)	(2,419)
Net Carrying Amount	$ 2,292	$ 539
Minimum [Member] | Customer and Agent Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period (Years)	5 years
Minimum [Member] | Software [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period (Years)	5 years
Minimum [Member] | Present Value of Future Profits [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period (Years)	3 months 18 days
Minimum [Member] | Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period (Years)	1 year 6 months
Maximum [Member] | Customer and Agent Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period (Years)	15 years
Maximum [Member] | Software [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period (Years)	10 years
Maximum [Member] | Present Value of Future Profits [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period (Years)	9 months
Maximum [Member] | Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period (Years)	6 years