Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	$ 13,423	$ 12,908
Gross Unrealized Gains	116	481
Gross Unrealized Losses	460	80
Fair Value (Net Carrying Amount)	13,079	13,309
Net unrealized gains or (losses) on investments	(429)	(17)	$ 175
Trading Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	4,160	4,335
Gross Unrealized Gains	79	374
Gross Unrealized Losses	188	9
Fair Value (Net Carrying Amount)	4,051	4,700
Trading Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	9,263	8,573
Gross Unrealized Gains	37	107
Gross Unrealized Losses	272	71
Fair Value (Net Carrying Amount)	$ 9,028	$ 8,609