Profit Sharing and Savings Plan (Details) - Profit Sharing and Savings Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Employer Matching Contribution	$ 363
Discretionary Employer Contribution	$ 41,365	$ 40,020	$ 56,709