Stockholders' Equity and Regulatory Capital (Narrative Disclosures) (Details) - right |
12 Months Ended | |
|---|---|---|
Jul. 15, 2008 |
Dec. 31, 2016 |
|
| Regulatory Capital Requirements [Abstract] | ||
| Dividend Paid of One Common Share Purchase Right for Each Outstanding Share of Common Stock | 1 | |
| Description of possible effects of noncompliance or less than adequately capitalized | Failure to meet minimum capital requirements can result in certain mandatory, and possibly additional discretionary actions on the part of regulators, that if undertaken, could have a direct material effect on the Banks’ assets, liabilities and certain off-balance-sheet items as calculated under regulatory practices. |