Fair Value Measurements Financial Instruments, Quantitative Information (Details)	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Time deposits [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.03%	0.02%	0.02%
Contractual Yield, Maximum	9.64%	9.64%	5.50%
Repricing (in years)	2 years 55 days	1 year 248 days	1 year 285 days
Discount Rate, Minimum	1.16%	0.80%	1.11%
Discount Rate, Maximum	1.43%	1.30%	1.57%
Other borrowings [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.25%	0.25%	0.25%
Contractual Yield, Maximum	3.28%	5.07%	3.40%
Repricing (in years)	7 days	0 days	1 day
Discount Rate, Minimum	0.30%	0.08%	0.20%
Discount Rate, Maximum	2.92%	2.65%	2.89%
Subordinated debentures [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	1.32%	0.96%	1.05%
Contractual Yield, Maximum	5.38%	0.96%	1.05%
Repricing (in years)	8 years 128 days	1 year 321 days	1 year 135 days
Discount Rate, Minimum	2.16%	1.79%	2.12%
Discount Rate, Maximum	5.38%	1.79%	2.12%
Commercial [Member] | Loans Receivable [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.38%	0.19%	0.25%
Contractual Yield, Maximum	30.00%	30.00%	30.00%
Repricing (in years)	252 days	230 days	226 days
Discount Rate, Minimum	0.55%	0.49%	0.52%
Discount Rate, Maximum	3.68%	4.42%	4.34%
Commercial Real Estate [Member] | Loans Receivable [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.38%	0.38%	0.38%
Contractual Yield, Maximum	18.00%	18.00%	18.00%
Repricing (in years)	266 days	277 days	266 days
Discount Rate, Minimum	0.80%	1.01%	0.95%
Discount Rate, Maximum	3.65%	3.77%	3.93%
Residential Mortgage [Member] | Loans Receivable [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	1.70%	1.25%	1.67%
Contractual Yield, Maximum	18.00%	18.00%	18.00%
Repricing (in years)	1 year 354 days	2 years 73 days	2 years 153 days
Discount Rate, Minimum	1.25%	0.97%	0.86%
Discount Rate, Maximum	3.75%	3.99%	4.25%
Personal [Member] | Loans Receivable [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.25%	0.38%	0.38%
Contractual Yield, Maximum	21.00%	21.00%	21.00%
Repricing (in years)	128 days	153 days	135 days
Discount Rate, Minimum	0.71%	0.78%	1.19%
Discount Rate, Maximum	3.91%	4.16%	4.11%