Repurchase Agreements Repurchase Agreements (Tables)

6 Months Ended

Jun. 30, 2017

Repurchase Agreements [Abstract]

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

	June 30, 2017
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Total
	(Dollars in thousands)
Sources of collateral
U.S. government agency securities	$	19,326	$	19,326
Agency mortgage-backed securities	63,364		63,364
Agency collateralized mortgage obligations	76,681		76,681
Total borrowings	$	159,371	$	159,371

	December 31, 2016
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		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