Profit Sharing and Savings Plan (Details) (Profit Sharing and Savings Plan, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Profit Sharing and Savings Plan
Defined Benefit Plan Disclosure [Line Items]
Profit Sharing Costs	$ 56,709	$ 34,132	$ 54,751