AFS Securities (AFS securities with gross unrealized losses) (Details) $ in Thousands	Sep. 30, 2015 USD ($) Securities	Dec. 31, 2014 USD ($) Securities
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	$ 125	$ 158
Fair Value, Less Than Twelve Months	38,605	44,214
Gross Unrealized Losses, Twelve Months or More	2,725	4,803
Fair Value, Twelve Months or More	100,681	138,616
Total Unrealized Losses	$ 2,850	$ 4,961
Number of Securities in an unrealized loss position, Less Than Twelve Months, Fair Value | Securities	35	22
Number of Securities in an unrealized loss position, Twelve Months or More, Fair Value | Securities	29	72
Number of Securities in an unrealized loss position, Total Unrealized Losses | Securities	64	94
Government sponsored enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	$ 0	$ 0
Fair Value, Less Than Twelve Months	0	0
Gross Unrealized Losses, Twelve Months or More	81	471
Fair Value, Twelve Months or More	23,915	23,525
Total Unrealized Losses	81	471
States and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	80	48
Fair Value, Less Than Twelve Months	12,168	5,323
Gross Unrealized Losses, Twelve Months or More	541	746
Fair Value, Twelve Months or More	3,602	17,416
Total Unrealized Losses	621	794
Auction rate money market preferred [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	0	0
Fair Value, Less Than Twelve Months	0	0
Gross Unrealized Losses, Twelve Months or More	493	581
Fair Value, Twelve Months or More	2,707	2,619
Total Unrealized Losses	493	581
Preferred stocks [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	0	0
Fair Value, Less Than Twelve Months	0	0
Gross Unrealized Losses, Twelve Months or More	608	691
Fair Value, Twelve Months or More	3,192	3,109
Total Unrealized Losses	608	691
Mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	42	5
Fair Value, Less Than Twelve Months	18,517	9,456
Gross Unrealized Losses, Twelve Months or More	578	999
Fair Value, Twelve Months or More	39,075	52,407
Total Unrealized Losses	620	1,004
Collateralized mortgage obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	3	105
Fair Value, Less Than Twelve Months	7,920	29,435
Gross Unrealized Losses, Twelve Months or More	424	1,315
Fair Value, Twelve Months or More	28,190	39,540
Total Unrealized Losses	$ 427	$ 1,420