Summary Of Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Jan. 01, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Loan impairment threshold period	90 days
Threshold of reporting unit goodwill carrying value for further analysis	$ 0
Prospective Adoption Of New Accounting Pronouncements [Abstract]
Impact of reduction in both other assets and senior notes		$ 9,900,000
Impact of reduction in both total assets and liabilities			$ 9,900,000