Loans, Troubled Debt Restructurings Performing and Nonaccrual (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	$ 80,070	$ 87,363
Nonaccrual Restructured Loans	31,758	37,684
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	30,248	29,293
Nonaccrual Restructured Loans	2,398	1,714
Commercial real estate — owner occupied
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	7,445	7,877
Nonaccrual Restructured Loans	2,275	2,703
Commercial real estate — investor
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	15,352	21,915
Nonaccrual Restructured Loans	941	3,936
Real estate construction
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	365	510
Nonaccrual Restructured Loans	154	177
Residential mortgage
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	18,049	19,870
Nonaccrual Restructured Loans	22,743	24,592
Home equity
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	7,685	7,069
Nonaccrual Restructured Loans	3,209	4,522
Other consumer
Financing Receivable, Modifications [Line Items]
Performing Restructured Loans	926	829
Nonaccrual Restructured Loans	$ 38	$ 40