Investments (Available-for-Sale Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 95,180	$ 94,497
Gross Unrealized Gains	4,254	4,800
Gross Unrealized Losses	1,699	2,588
Fair Value	97,735	96,709
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	40,533	38,245
Gross Unrealized Gains	748	747
Gross Unrealized Losses	878	1,728
Fair Value	40,403	37,264
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,970	15,324
Gross Unrealized Gains	134	157
Gross Unrealized Losses	173	224
Fair Value	10,931	15,257
Private Label Asset Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,910	6,029
Gross Unrealized Gains	29	24
Gross Unrealized Losses	165	380
Fair Value	7,774	5,673
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14,806	14,654
Gross Unrealized Gains	507	869
Gross Unrealized Losses	147	47
Fair Value	15,166	15,476
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,618	17,825
Gross Unrealized Gains	208	413
Gross Unrealized Losses	308	96
Fair Value	18,518	18,142
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	92,837	92,077
Gross Unrealized Gains	1,626	2,210
Gross Unrealized Losses	1,671	2,475
Fair Value	92,792	91,812
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,343	2,420
Gross Unrealized Gains	2,628	2,590
Gross Unrealized Losses	28	113
Fair Value	$ 4,943	$ 4,897