Investments (Available-for-Sale Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 94,615	$ 95,180
Gross Unrealized Gains	4,479	4,254
Gross Unrealized Losses	1,402	1,699
Fair Value	97,692	97,735
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	39,724	40,533
Gross Unrealized Gains	952	748
Gross Unrealized Losses	747	878
Fair Value	39,929	40,403
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,431	10,970
Gross Unrealized Gains	110	134
Gross Unrealized Losses	233	173
Fair Value	10,308	10,931
Private Label Asset Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,032	7,910
Gross Unrealized Gains	53	29
Gross Unrealized Losses	63	165
Fair Value	10,022	7,774
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14,745	14,806
Gross Unrealized Gains	524	507
Gross Unrealized Losses	100	147
Fair Value	15,169	15,166
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,340	18,618
Gross Unrealized Gains	188	208
Gross Unrealized Losses	259	308
Fair Value	17,269	18,518
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	92,272	92,837
Gross Unrealized Gains	1,827	1,626
Gross Unrealized Losses	1,402	1,671
Fair Value	92,697	92,792
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,343	2,343
Gross Unrealized Gains	2,652	2,628
Gross Unrealized Losses	0	28
Fair Value	$ 4,995	$ 4,943