Loans, Troubled Debt Restructurings Performing and Nonaccrual (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	$ 83,426	$ 87,363
Nonaccrual Restructured Loans	34,841	37,684
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	29,179	29,293
Nonaccrual Restructured Loans	2,536	1,714
Commercial real estate — owner occupied
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	7,509	7,877
Nonaccrual Restructured Loans	2,620	2,703
Commercial real estate — investor
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	20,191	21,915
Nonaccrual Restructured Loans	957	3,936
Real estate construction
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	372	510
Nonaccrual Restructured Loans	94	177
Residential Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	18,314	19,870
Nonaccrual Restructured Loans	24,479	24,592
Home Equity Portfolio Segments [Member]
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	6,955	7,069
Nonaccrual Restructured Loans	4,127	4,522
Other consumer
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	906	829
Nonaccrual Restructured Loans	$ 28	$ 40