Securities (Summary of Volume of State and Political Subdivision Securities Held in Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	$ 276,793	$ 290,603	$ 289,614
Available for sale securities, Unrealized Gains	6,863	4,809	3,851
Available for sale securities, Unrealized Losses	1,255	4,154	4,685
Available for sale securities, Estimated Fair Value	282,401	291,258	288,780
California [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	14,959
Available for sale securities, Unrealized Gains	572
Available for sale securities, Unrealized Losses	3
Available for sale securities, Estimated Fair Value	15,528
West Virginia [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	14,048
Available for sale securities, Unrealized Gains	330
Available for sale securities, Unrealized Losses	40
Available for sale securities, Estimated Fair Value	14,338
Illinois [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	8,963
Available for sale securities, Unrealized Gains	255
Available for sale securities, Unrealized Losses	35
Available for sale securities, Estimated Fair Value	9,183
Texas [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	7,391
Available for sale securities, Unrealized Gains	418
Available for sale securities, Unrealized Losses	44
Available for sale securities, Estimated Fair Value	7,765
Pennsylvania [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized Cost	7,404
Available for sale securities, Unrealized Gains	148
Available for sale securities, Unrealized Losses	6
Available for sale securities, Estimated Fair Value	$ 7,546