Investments (Gross Unrealized Losses and Fair Values of Securities) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	$ 57,506	$ 39,394
Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses	583	108
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	45,897	66,981
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses	9,278	13,864
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value	36,827	3,850
Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss	294	5
Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value	0	2,608
Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss	0	117
U.S. Treasury [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	0	27,096
Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses	0	11
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	0	0
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses	0	0
US government agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	13,963	0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses	102	0
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	9,959	18,819
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses	41	253
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value	6,985	0
Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss	33	0
Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value	0	0
Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss	0	0
Residential mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	0	0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses	0	0
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	8,437	17,918
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses	268	412
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value	23,233	3,850
Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss	121	5
Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value	0	0
Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss	0	0
Commercial mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	23,311	12,298
Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses	100	97
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	0	973
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses	0	6
Collateralized mortgage obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	5,701
Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses	91
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	0
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses	0
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value	6,609
Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss	140
Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value	0
Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss	0
Obligations of states and political subdivisions [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	14,531	0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses	290	0
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	4,860	8,981
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses	154	260
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value		0
Held-to-maturity securities, continuous unrealized loss position, less than 12 months, unrealized loss		0
Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value		2,608
Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, unrealized loss		117
Collateralized debt obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	0	0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, unrealized losses	0	0
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	22,641	20,290
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, unrealized losses	$ 8,815	$ 12,933