Investment Securities Available for Sale (Securities with Continuous Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
In loss position for Less than 12 months, Fair Value	$ 5,945	$ 15,999
In loss position for Less than 12 months, Unrealized Losses	(55)	(260)
Total Fair Value	5,945	15,999
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	(55)	(260)
Marketable equity securities
Schedule of Available-for-sale Securities [Line Items]
In loss position for Less than 12 months, Fair Value	5,945	5,746
In loss position for Less than 12 months, Unrealized Losses	(55)	(254)
Total Fair Value	5,945	5,746
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	$ (55)	(254)
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
In loss position for Less than 12 months, Unrealized Losses		(6)
Total Fair Value		10,253
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)