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Regulatory Matters (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity tier 1 ratio	5.125%	4.50%
Tier 1 capitol ratio	6.625%	6.00%	4.00%
Total capital ratio	8.625%	8.00%
Leverage ratio	4.00%	4.00%
Capital requirements phased period	5 years
Capital conservation buffer	0.625%
Capital conservation buffer, full implementation	2.50%
Common equity tier 1 capital ratio, full implementation	7.00%
Tier 1 capital ratio, full implementation	8.50%
Total capital ratio, full implementation	10.50%
Well-Capitalized ratio	6.50%	6.50%
Tier 1 Capital well-capitalized ratio	8.00%	8.00%	6.00%
Tier 1 Leverage Ratio	3.00%
Risk Weight For Loans	150.00%	100.00%
Credit Conversion Factor	20.00%	0.00%
Risk wieght for servicing rights and deferred tax assets	250.00%	100.00%
Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Risk weight for equity exposures	0.00%
Maximum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Risk weight for equity exposures	600.00%

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The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

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The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action.

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