Investment Securities, Contract Maturity (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013
Amortized Cost [Abstract]
Within one year	$ 10,473
After one year through five years	3,232
After five years through ten years	0
After ten years	0
Amortized cost, before single maturity date	13,705
Investment securities not due at a single maturity date	321,187
Amortized cost, Total	334,892
Fair/Book Value [Abstract]
Within one year	10,496
After one year through five years	3,350
After five years through ten years	0
After ten years	0
Fair/Book Value, before single maturity date	13,846
Investment securities not due at a single maturity date	322,680
Fair/Book Value, Total	336,526		404,639		421,765
Amortized Cost [Abstract]
Within one year	4,115
After one year through five years	17,518
After five years through ten years	13,440
After ten years	34,368
Amortized cost, before single maturity date	69,441
Investment securities not due at a single maturity date	0
Amortized cost, Total	69,441		68,505		70,961
Fair Value [Abstract]
Within one year	4,117
After one year through five years	17,814
After five years through ten years	13,589
After ten years	34,629
Fair/Book Value, before single maturity date	70,149
Investment securities not due at a single maturity date	0
Fair Value	70,149		68,690		71,186
Government Agency & Government Sponsored Entities [Member]
Fair/Book Value [Abstract]
Fair/Book Value, Total	13,361		28,436		28,643
Mortgage Backed Securities [Member]
Fair/Book Value [Abstract]
Fair/Book Value, Total	322,680	[1]	324,929	[1]	342,077	[1]
Corporate Securities [Member]
Fair/Book Value [Abstract]
Fair/Book Value, Total			49,380		49,761
Other [Member]
Fair/Book Value [Abstract]
Fair/Book Value, Total	$ 485		$ 1,894		$ 1,284

[1] All Mortgage Backed Securities consist of securities collateralized by residential real estate and were issued by an agency or government sponsored entity of the U.S. government.