Loans (Loan Maturities) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	$ 231,195
Loan maturities, After 1 but within 5 Years	276,577
Loan maturities, After 5 Years	1,187,280
Loans due after one year with: Variable rates	546,499
Loans due after one year with: Fixed rates	917,358
Loans due after one year	1,463,857
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	96,076
Loan maturities, After 1 but within 5 Years	63,124
Loan maturities, After 5 Years	35,115
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	37,675
Loan maturities, After 1 but within 5 Years	113,790
Loan maturities, After 5 Years	679,723
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	29,718
Loan maturities, After 1 but within 5 Years	23,207
Loan maturities, After 5 Years	40,639
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	22,176
Loan maturities, After 1 but within 5 Years	50,982
Loan maturities, After 5 Years	418,328
Mortgage Warehouse Lines [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	39,140
Loan maturities, After 1 but within 5 Years	0
Loan maturities, After 5 Years	0
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	5,181
Loan maturities, After 1 but within 5 Years	23,172
Loan maturities, After 5 Years	4,107
Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	1,229
Loan maturities, After 1 but within 5 Years	2,302
Loan maturities, After 5 Years	$ 9,368