Parent Company Only Financial Information (Interim Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
ASSETS
AFS securities	$ 602,463	$ 660,136
Premises and equipment	28,244	28,331
Other assets	6,582	9,991
TOTAL ASSETS	1,680,359	1,668,112
LIABILITIES AND SHAREHOLDERS' EQUITY
Shareholders' equity	195,133	183,971	$ 178,025	$ 174,594
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,680,359	1,668,112
Parent Company [Member]
ASSETS
Cash on deposit at subsidiary Bank	2,554	4,125
AFS securities	253	257
Investments in subsidiaries	144,906	133,883
Premises and equipment	2,003	2,014
Other assets	53,429	53,396
TOTAL ASSETS	203,145	193,675
LIABILITIES AND SHAREHOLDERS' EQUITY
Other liabilities	8,012	9,704
Shareholders' equity	195,133	183,971
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 203,145	$ 193,675