Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans	$ 11,742	$ 23,654
Private Equity Investments Nonrecurring Basis	984	500
Mortgage servicing rights	878	779
Foreclosed assets	2,540	1,287
Long-lived assets	9,895	0
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans	0	0
Private Equity Investments Nonrecurring Basis	0	0
Mortgage servicing rights	0	0
Foreclosed assets	0	0
Long-lived assets	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans	0	0
Private Equity Investments Nonrecurring Basis	0	0
Mortgage servicing rights	0	0
Foreclosed assets	0	0
Long-lived assets	0	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans	11,742	23,654
Private Equity Investments Nonrecurring Basis	984	500
Mortgage servicing rights	878	779
Foreclosed assets	2,540	1,287
Long-lived assets	9,895	0
Total Gains (Losses) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans, Total Gains (Losses)	(1,184)	(8,406)
Private Equity Investments Nonrecurring Basis Gains Losses	(1,516)	(500)
Mortgage servicing rights, Total Gains (Losses)	(13)	309
Foreclosed assets, Total Gains (Losses)	(706)	(430)
Long-lived assets, Total Gains (Losses)	$ (2,327)	$ 0