Subsequent Events (Revolving Credit Facility) (Details) - USD ($) $ in Thousands	Jul. 21, 2016	Jun. 30, 2016
Line of Credit [Member]
Subsequent Event [Line Items]
Maximum borrowing capacity		$ 400,000
Subsequent Event [Member] | Line of Credit [Member]
Subsequent Event [Line Items]
Senior secured revolving credit facility terminated	$ 400,000
Subsequent Event [Member] | Line of Credit [Member]
Subsequent Event [Line Items]
Term of revolving credit facility	5 years
Subsequent Event [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Maximum borrowing capacity	$ 1,000,000
Current amount committed to be provided by lender	250,000
Subsequent Event [Member] | Line of Credit [Member] | Letter of Credit [Member]
Subsequent Event [Line Items]
Maximum borrowing capacity	200,000
Subsequent Event [Member] | Line of Credit [Member] | Bridge Loan [Member]
Subsequent Event [Line Items]
Maximum borrowing capacity	$ 50,000