Regulatory Capital Matters (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jan. 01, 2016
Regulatory Capital Matters [Abstract]
Percent of Qualified Thrift Lender test requires	65.00%
Common equity tier 1 capital to risk-weighted assets, ratio	4.50%
Capital conservation buffer	2.50%	0.625%
Common Equity Tier 1 capital to risk weighted assets, upon full implementation, ratio	7.00%
Tier 1 capital to risk-weighted assets, ratio	6.00%
Tier 1 capital to risk weighted assets, upon full implementation, ratio	8.50%
Total capital to risk-weighted assets, ratio	8.00%
Total capital to risk weighted assets, upon full implementation, ratio	10.50%
Minimum leverage ratio	4.00%
Capital conservative buffer phase period	4 years
Opening Balance in Liquidation Account	$ 14,300
Future percent, common equity of risk-weighted assets	2.50%