Mortgage-Backed Securities Narrative Tagging (Details)		1 Months Ended	3 Months Ended
	Jan. 31, 2016 USD ($) Integer	Jan. 31, 2016 USD ($) Integer	Mar. 31, 2016 USD ($)
Proceeds from Sale of Available-for-sale Securities		$ 15,000,000	$ 9,295,000
Number of Available for Sale Securities, Held in a Trust | Integer	3	3
Repayment of debt financing			5,000,000
Available-for-sale Securities, Carrying Value, Mortgage-backed Securities			0
Trust Portfolio M B S Bonds
Proceeds from Sale of Available-for-sale Securities	$ 15,000,000
Number of Available for Sale Securities, Held in a Trust | Integer	3	3
Repayment of debt financing	$ 11,900,000
Proceeds from Sale of Available-for-sale Securities	11,000,000		11,000,000
Available-for-sale Securities, Gross Realized Gain (Loss)	$ 0		$ 0