Deposits (Time and Brokered Deposit Issued in Amounts of $250,000 Or More and Remaining Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Cash and Cash Equivalents [Line Items]
Contractual Maturities, Time Deposits 250,000 or More, Three months or less	$ 24,058
Contractual Maturities, Time Deposits 250,000 or More, Over three through six months	17,208
Contractual Maturities, Time Deposits 250,000 or More, Over six through twelve months	11,048
Contractual Maturities, Time Deposits 250,000 or More, Over one year through two years	6,648
Contractual Maturities, Time Deposits 250,000 or More, Over two years	501
Time Deposits, 250,000 or More	59,463	$ 78,600
Time Deposits [Member]
Cash and Cash Equivalents [Line Items]
Contractual Maturities, Time Deposits 250,000 or More, Three months or less	24,058
Contractual Maturities, Time Deposits 250,000 or More, Over three through six months	17,208
Contractual Maturities, Time Deposits 250,000 or More, Over six through twelve months	11,048
Contractual Maturities, Time Deposits 250,000 or More, Over one year through two years	6,648
Contractual Maturities, Time Deposits 250,000 or More, Over two years	501
Time Deposits, 250,000 or More	$ 59,463