Investment Securities Available for Sale (Securities with Continuous Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
In loss position for Less than 12 months, Fair Value	$ 15,999	$ 15,991
In loss position for Less than 12 months, Unrealized Losses	(260)	(77)
Total Fair Value	15,999	15,991
In loss position for 12 months or more, Fair Value	0	0
In loss position for 12 months or more, Unrealized Losses	0	0
Total Unrealized Losses	(260)	(77)
Marketable equity securities
Schedule of Available-for-sale Securities [Line Items]
In loss position for Less than 12 months, Fair Value	5,746	5,938
In loss position for Less than 12 months, Unrealized Losses	(254)	(62)
Total Fair Value	5,746	5,938
In loss position for 12 months or more, Fair Value	0	0
In loss position for 12 months or more, Unrealized Losses	0	0
Total Unrealized Losses	(254)	(62)
Mutual funds invested in fixed income securities
Schedule of Available-for-sale Securities [Line Items]
In loss position for Less than 12 months, Fair Value	10,253	10,053
In loss position for Less than 12 months, Unrealized Losses	(6)	(15)
Total Fair Value	10,253	10,053
In loss position for 12 months or more, Fair Value		0
In loss position for 12 months or more, Unrealized Losses		0
Total Unrealized Losses	$ (6)	$ (15)