Summary of Significant Accounting Policies (Summary of Interest Capitalized and Depreciation Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Capitalized interest	$ 166	$ 420	$ 182
Depreciation expense	$ 17,869	$ 19,712	$ 20,478