Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2013 Restatement Adjustment	Jun. 30, 2013 Restatement Adjustment	Sep. 30, 2013 Restatement Adjustment	Dec. 31, 2013 Restatement Adjustment	Dec. 31, 2012 Restatement Adjustment	Dec. 31, 2011 Restatement Adjustment
Cash and cash equivalents	$ 123,532	$ 80,359	$ (8,008)	$ (7,446)	$ (3,737)	$ (2,010)	$ (1,760)	$ (3,749)
Accounts Payable and Accrued Expenses			(8,008)	(7,446)	(3,737)	(2,010)	(1,760)	(3,749)
Net Cash Provided by (Used in) Operating Activities	432,799	431,319	(6,248)	(5,686)	(1,977)	(250)	1,989	(2,215)
Cash and cash equivalents at beginning of year	67,228	61,374	(1,760)	(1,760)	(1,760)	(1,760)	(3,749)	(1,534)
Cash and cash equivalents at end of period	$ 123,532	$ 80,359	$ (8,008)	$ (7,446)	$ (3,737)	$ (2,010)	$ (1,760)	$ (3,749)