Loans (Loan Maturities) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	$ 222,838
Loan maturities, After 1 but within 5 Years	174,945
Loan maturities, After 5 Years	921,753
Loans due after one year with: Variable rates	176,358
Loans due after one year with: Fixed rates	920,340
Loans due after one year	1,096,698
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	48,602
Loan maturities, After 1 but within 5 Years	47,689
Loan maturities, After 5 Years	22,797
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	28,685
Loan maturities, After 1 but within 5 Years	49,032
Loan maturities, After 5 Years	507,251
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	37,852
Loan maturities, After 1 but within 5 Years	15,702
Loan maturities, After 5 Years	35,072
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	16,795
Loan maturities, After 1 but within 5 Years	43,221
Loan maturities, After 5 Years	345,849
Mortgage Warehouse Lines [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	85,966
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	4,515
Loan maturities, After 1 but within 5 Years	17,703
Loan maturities, After 5 Years	3,316
Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan maturities, Within 1 Year	423
Loan maturities, After 1 but within 5 Years	1,598
Loan maturities, After 5 Years	$ 7,468