Statutory Accounting Practices (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Statutory Accounting Practices [Line Items]
Net realized investment gains (losses)	$ 100,000	$ 4,439,000
NSIC [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Net Income Amount	1,051,000	1,427,000
Tier One Risk Based Capital	12,924,000	12,383,000
Net realized investment gains (losses)	455,000	111,000
Asset Valuation Reserve	832,000	806,000
NSFC [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Net Income Amount	6,590,000	2,389,000
Tier One Risk Based Capital	32,314,000	26,317,000
Net realized investment gains (losses)	(477,000)	939,000
Investment in Omega One	6,364	5,473
Omega [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Net Income Amount	830,000	890,000
Tier One Risk Based Capital	9,864,000	8,975,000
Net realized investment gains (losses)	$ 120,000	$ 81,000