Fair Value Measurements Financial Instruments, Quantitative Information (Details)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Time deposits [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.02%	0.02%	0.03%
Contractual Yield, Maximum	9.64%	9.64%	9.64%
Repricing (in years)	1 year 288 days	1 year 336 days	2 years 29 days
Discount Rate, Minimum	0.78%	0.76%	0.74%
Discount Rate, Maximum	1.24%	1.33%	1.32%
Other borrowings [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.25%	0.21%	0.23%
Contractual Yield, Maximum	4.78%	1.52%	4.50%
Repricing (in years)	7 days	44 days	4 days
Discount Rate, Minimum	0.06%	0.06%	0.06%
Discount Rate, Maximum	2.64%	2.64%	2.62%
Subordinated debentures [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.92%	0.92%	0.95%
Contractual Yield, Maximum	5.00%	5.00%	5.00%
Repricing (in years)	1 year 157 days	1 year 245 days	2 years 146 days
Discount Rate, Minimum	2.11%	2.14%	2.21%
Discount Rate, Maximum	2.11%	2.14%	2.21%
Loans Receivable [Member] | Commercial [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.18%	0.17%	0.15%
Contractual Yield, Maximum	30.00%	30.00%	30.00%
Repricing (in years)	252 days	237 days	190 days
Discount Rate, Minimum	0.49%	0.51%	0.55%
Discount Rate, Maximum	4.15%	4.34%	4.28%
Loans Receivable [Member] | Commercial Real Estate [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)	303 days	307 days	270 days
Discount Rate, Minimum	1.03%	1.09%	1.15%
Discount Rate, Maximum	3.63%	3.78%	3.54%
Loans Receivable [Member] | Residential Mortgage [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	1.20%	1.20%	0.01%
Contractual Yield, Maximum	18.00%	18.00%	18.00%
Repricing (in years)	2 years 77 days	2 years 183 days	2 years 219 days
Discount Rate, Minimum	0.70%	0.64%	0.57%
Discount Rate, Maximum	3.84%	3.99%	4.54%
Loans Receivable [Member] | Consumer [Member]
Fair Value Inputs, Financial Instruments, Quantitative Information [Line Items]
Contractual Yield, Minimum	0.38%	0.38%	0.38%
Contractual Yield, Maximum	21.00%	21.00%	21.00%
Repricing (in years)	157 days	164 days	183 days
Discount Rate, Minimum	0.99%	1.04%	1.14%
Discount Rate, Maximum	3.88%	3.98%	3.80%