Debt - Repurchase Agreements - Investment Securities (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Securities Sold under Agreements to Repurchase [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Line of credit fixed rate	1.47%	1.47%
Interest expense	$ 100,000	$ 100,000
JPM Repo Facility [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Interest expense		500,000
JPM Repo Facility [Member] | Revolving Credit Facility [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Revolving line of credit	53,700,000	53,700,000
Interest expense	500,000
Repurchase Period One [Member] | JPM Repo Facility [Member] | Securities Sold under Agreements to Repurchase [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Line of credit fixed rate	1.446%	1.446%
Repurchase Period One [Member] | JPM Repo Facility [Member] | Revolving Credit Facility [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Revolving line of credit	15,800,000	15,800,000
Repurchase Period One [Member] | CITIGROUP GLOBAL MARKETS [Member] | Securities Sold under Agreements to Repurchase [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Line of credit fixed rate	1.533%	1.533%
Interest expense		0
Repurchase Period One [Member] | Wells Fargo Securities LLC [Member] | Securities Sold under Agreements to Repurchase [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Line of credit fixed rate	1.504%	1.504%
Interest expense		0
Repurchase Period Two [Member] | JPM Repo Facility [Member] | Revolving Credit Facility [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Revolving line of credit	4,000,000	4,000,000
Repurchase Period Three [Member] | JPM Repo Facility [Member] | Revolving Credit Facility [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Revolving line of credit	$ 3,800,000	$ 3,800,000