Ownership of Southern Trust Mortgage (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended
	May 30, 2008 membership_unit	May 31, 2014	Dec. 31, 2014	May 14, 2014	May 31, 2008
Business Acquisition [Line Items]
Percentage interest in issued and outstanding membership interest		62.30%
Southern Trust Mortgage [Member]
Business Acquisition [Line Items]
Number of membership units acquired	1
Cost to acquire membership interest	$ 1.6
Percentage ownership interest, minimum					50.00%
Percentage interest in issued and outstanding membership interest			62.30%
Ownership interest, percentage sold				100.00%