Derivative Financial Instruments (Narrative) (Details) $ in Thousands	Dec. 31, 2016 USD ($) derivative_instrument	Dec. 31, 2015 USD ($) derivative_instrument
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Notional amount	$ 60,000	$ 0
Interest rate swaps with customers [Member]
Derivatives, Fair Value [Line Items]
Notional amount	428,723	302,142
Mirror swaps with counterparties [Member]
Derivatives, Fair Value [Line Items]
Notional amount	428,723	302,142
Risk participation-in agreement [Member]
Derivatives, Fair Value [Line Items]
Notional amount	$ 28,460	21,474
Designated as Hedging Instrument [Member] | Interest rate caps [Member]
Derivatives, Fair Value [Line Items]
Number of derivative instruments held | derivative_instrument	2
Notional amount	$ 22,700	22,700
Interest rate cap premium		$ 257
Interest rate cap strike		4.50%
Designated as Hedging Instrument [Member] | Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Number of derivative instruments held | derivative_instrument	2	2
Notional amount	$ 60,000
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member]
Derivatives, Fair Value [Line Items]
Notional amount	428,700	$ 302,100
Not Designated as Hedging Instrument [Member] | Risk participation-out agreement [Member]
Derivatives, Fair Value [Line Items]
Notional amount	38,300	25,300
Not Designated as Hedging Instrument [Member] | Risk participation-in agreement [Member]
Derivatives, Fair Value [Line Items]
Notional amount	$ 28,500	$ 21,500