Fair Value - Liabilties (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Estimate Of Fair Value Fair Value Disclosure [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Large Capitalization Registered Investment Companies	$ 405	$ 336
Mid Capitalization Registered Investment Companies	109	88
Small Capitalization Registered Investment Companies	95	72
International Developed And Emerging Markets Registered Investment Companies	205	187
Fixed Income Registered Investment Companies	43	48
Fixed General Account	167	173
Acquisition-related Consideration	4,876	4,901
Liabilities Fair Value Disclosure	5,900	5,805
Fair Value Inputs Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Large Capitalization Registered Investment Companies	405	336
Mid Capitalization Registered Investment Companies	109	88
Small Capitalization Registered Investment Companies	95	72
International Developed And Emerging Markets Registered Investment Companies	205	187
Fixed Income Registered Investment Companies	43	48
Fixed General Account	0	0
Acquisition-related Consideration	0	0
Liabilities Fair Value Disclosure	857	731
Fair Value Inputs Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Large Capitalization Registered Investment Companies	0	0
Mid Capitalization Registered Investment Companies	0	0
Small Capitalization Registered Investment Companies	0	0
International Developed And Emerging Markets Registered Investment Companies	0	0
Fixed Income Registered Investment Companies	0	0
Fixed General Account	167	173
Acquisition-related Consideration	0	0
Liabilities Fair Value Disclosure	167	173
Fair Value Inputs Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Large Capitalization Registered Investment Companies	0	0
Mid Capitalization Registered Investment Companies	0	0
Small Capitalization Registered Investment Companies	0	0
International Developed And Emerging Markets Registered Investment Companies	0	0
Fixed Income Registered Investment Companies	0	0
Fixed General Account	0	0
Acquisition-related Consideration	4,876	4,901
Liabilities Fair Value Disclosure	$ 4,876	$ 4,901