Investment Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value
Less than 12 months	$ 57,964	$ 29,598
12 months or longer	217	213
Total temporarily impaired securities	58,181	29,811
Unrealized losses
Less than 12 months	(883)	(939)
12 months or longer	(15)	(18)
Total Unrealized losses on temporarily impaired securities	(898)	(957)
Fair value
Total fair value	68,853	94,058
Affiliated mutual funds
Fair Value
Less than 12 months	57,964	29,598
12 months or longer	217	213
Total temporarily impaired securities	58,181	29,811
Unrealized losses
Less than 12 months	(883)	(939)
12 months or longer	(15)	(18)
Total Unrealized losses on temporarily impaired securities	(898)	(957)
Fair value
Total fair value	59,393	84,048
Mortgage-Backed Securities and Bonds
Fair value
Within one year	9,369
After five years but within 10 years	35
Total fair value	9,404
Corporate bonds
Fair value
Total fair value	9,369	9,412
Amortized Cost
Within one year	11,190
Total amortized cost	11,190
Fair value
Within one year	11,218
Total fair value	$ 11,218