Summary of Significant Accounting Policies (Income Taxes Paid) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Income taxes paid, net	$ 600,000		$ 7,000,000
Proceeds from Income Tax Refunds		$ 830,000