Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 branch_office operating_lease	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Number of offices	6
Number of operating leases	7
Branch closure obligation	$ 1.1	$ 0.3
Rental expense	$ 0.8	$ 0.8	$ 0.8
Employment agreements, contract term	1 year