Accumulated Other Comprehensive Income (Loss) (Changes in AOCI by component) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	$ 245	$ 0	$ 245	$ 0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	5,018	2,484	221	(506)
OCI before reclassifications	3,915	(6,520)	11,189	(2,164)
Amounts reclassified from AOCI	(245)	0	(245)	0
Net unrealized gains (losses)	3,670	(6,520)	10,944	(2,164)
Tax effect	(1,121)	2,165	(3,598)	799
Unrealized gains (losses), net of tax	2,549	(4,355)	7,346	(1,365)
Ending Balance	7,567	(1,871)	7,567	(1,871)
Unrealized Holding Gains (Losses) on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	245	0		0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	8,333	6,292	3,536	3,302
OCI before reclassifications	4,067	(6,520)	11,341	(2,164)
Amounts reclassified from AOCI	(245)	0	(245)	0
Net unrealized gains (losses)	3,822	(6,520)	11,096	(2,164)
Tax effect	(1,173)	2,165	(3,650)	799
Unrealized gains (losses), net of tax	2,649	(4,355)	7,446	(1,365)
Ending Balance	10,982	1,937	10,982	1,937
Defined Benefit Pension Plan [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,315)	(3,808)	(3,315)	(3,808)
OCI before reclassifications	0	0	0	0
Amounts reclassified from AOCI	0	0	0	0
Net unrealized gains (losses)	0	0	0	0
Tax effect	0	0	0	0
Unrealized gains (losses), net of tax	0	0	0	0
Ending Balance	(3,315)	(3,808)	(3,315)	(3,808)
Unrealized Holding Gains (Losses) on AFS Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0	0	0	0
OCI before reclassifications	(152)	0	(152)	0
Amounts reclassified from AOCI	0	0	0	0
Net unrealized gains (losses)	(152)	0	(152)	0
Tax effect	52	0	52	0
Unrealized gains (losses), net of tax	(100)	0	(100)	0
Ending Balance	(100)	0	(100)	0
Auction Rate Money Market Preferred Stocks [Member] | Unrealized Holding Gains (Losses) on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0	0	0	0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Unrealized gains (losses), net of tax	$ 372	$ 360	$ 360	$ 190