Investment Securities (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Investment Securities
Amount of transfer between levels	$ 0	$ 0
Fair value of investments
Total investment securities	201,348	176,142
Level 1
Fair value of investments
Total investment securities	176,760	132,822
Level 1 | Common Stock
Fair value of investments
Total investment securities	60	37
Level 1 | Affiliated mutual funds
Fair value of investments
Total investment securities	176,700	132,785
Level 2
Fair value of investments
Total investment securities	24,588	43,320
Level 2 | Mortgage-backed securities
Fair value of investments
Total investment securities	46	54
Level 2 | Municipal bonds
Fair value of investments
Total investment securities	501	501
Level 2 | Corporate bonds
Fair value of investments
Total investment securities	24,041	42,765
Total | Mortgage-backed securities
Fair value of investments
Total investment securities	46	54
Total | Municipal bonds
Fair value of investments
Total investment securities	501	501
Total | Corporate bonds
Fair value of investments
Total investment securities	24,041	42,765
Total | Common Stock
Fair value of investments
Total investment securities	60	37
Total | Affiliated mutual funds
Fair value of investments
Total investment securities	$ 176,700	$ 132,785