Profit Sharing Plan (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Employer matching contributions and earnings, vesting schedule	5 years
Employer matching contributions, vesting period of service	$ 407,000	$ 4,000,000	$ 3,400,000
Profit Sharing Plan
Defined Benefit Plan Disclosure [Line Items]
Employer matching contributions and earnings, vesting schedule	5 years