1. Significant Accounting Policies Details (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets	$ 47,852	$ 64,618
Restricted investments	4,560	4,210
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets		1,800
Restricted investments	$ 2,000	$ 1,400