Loans (Narrative) (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) contract segment item	Mar. 31, 2015 contract
Loans [Abstract]
Number of loan portfolio segments | segment	2
Maximum amount of commercial loans that use third-party credit scoring software models for risk rating purposes | $	$ 750,000
Number of risk ratings used to grade loans | item	10
Number of lowest risk ratings combined given a "pass" rating | item	7
Number of loans modified under TDRs | contract	0	0
Number of defaults | contract	0