Repurchase Agreements Repurchase Agreements (Tables)

3 Months Ended

Mar. 31, 2017

Repurchase Agreements [Abstract]

Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]

	March 31, 2017
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
	(Dollars in thousands)
Sources of collateral
U.S. government agency securities	$	16,762	$	—	$	—	$	—	$	16,762
Agency mortgage-backed securities	56,837		—		—		—		56,837
Agency collateralized mortgage obligations	72,173		—		—		—		72,173
Total borrowings	$	145,772	$	—	$	—	$	—	$	145,772

	December 31, 2016
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
	(Dollars in thousands)
Sources of Collateral
U.S. government agency securities	$	20,233	$	—	$	—	$	—	$	20,233
Agency mortgage-backed securities	79,079		—		—		—		79,079
Agency collateralized mortgage obligations	77,601		—		—		—		77,601
Total borrowings	$	176,913	$	—	$	—	$	—	$	176,913