Related Party Transactions Registration Rights (Details) (Investor [Member], USD $)	12 Months Ended
	Dec. 31, 2013 offering
Investor [Member]
Related Party Transaction [Line Items]
Registration rights period after initial public offering maximum	12 months
Shelf registration statement effective period	120 days
Minimum market value of registrable shares	$ 150,000,000
Maximum number of underwritten offerings obligated to effect in a 12 month period	2
Maximum number of underwritten offerings obligated to effect period	12 months
Maximum number of underwritten offerings obligated to effect	4
Period following shelf effective date	180 days
Number of underwritten offerings	4
Share value cut back threshold	25,000,000
Maximum reimbursement of liabilities arising under the Securities Act	$ 25,000