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Investments (Held-To-Maturity Securities Disclosure) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 160,090	$ 201,054
Net Unrealized Gains (Losses)	207	300
Carrying Value	160,297	201,354
Unrecognized Holding Gains	6,764	8,190
Unrecognized Holding Losses	0	0
Held-to-maturity Securities, Fair Value	$ 167,061	209,544
Held-to-maturity Securities Average Duration	1 year 9 months
Obligations of States and Political Subdivisions [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 131,480	175,269
Net Unrealized Gains (Losses)	533	848
Carrying Value	132,013	176,117
Unrecognized Holding Gains	4,260	5,763
Unrecognized Holding Losses	0	0
Held-to-maturity Securities, Fair Value	136,273	181,880
Corporate Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	23,995	20,228
Net Unrealized Gains (Losses)	(175)	(185)
Carrying Value	23,820	20,043
Unrecognized Holding Gains	2,286	1,972
Unrecognized Holding Losses	0	0
Held-to-maturity Securities, Fair Value	26,106	22,015
Asset-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	126	1,030
Net Unrealized Gains (Losses)	0	(120)
Carrying Value	126	910
Unrecognized Holding Gains	0	118
Unrecognized Holding Losses	0	0
Held-to-maturity Securities, Fair Value	126	1,028
Commercial Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	4,489	4,527
Net Unrealized Gains (Losses)	(151)	(243)
Carrying Value	4,338	4,284
Unrecognized Holding Gains	218	337
Unrecognized Holding Losses	0	0
Held-to-maturity Securities, Fair Value	$ 4,556	$ 4,621

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

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