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Subsequent Events (Notes)	3 Months Ended
Subsequent Events (Notes)	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On May 1, 2017, the shareholders of the Corporation approved amendments to the Corporation's Articles of Incorporation to (i) increase the number of shares of common stock which it is authorized to issue from 50,000,000 to 100,000,000 shares; and (ii) eliminate the designations for the Fixed Rate Cumulative Perpetual Preferred Stock, Series A, and the Senior Non-Cumulative Perpetual Preferred Stock, Series B, neither of which Series had any outstanding shares.