Financial Commitments (Reconciliation Of Outstanding Debt Balance To Reported Debt Balance) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Unamortized Discount and Issuance Cost	$ (10,948)	$ (6,697)
Total debt	825,733	817,684
Original Revolver [Member]
Outstanding Long Term Debt	183,500	158,000
Unamortized Discount and Issuance Cost	(4,762)	(2,185)
Total debt	178,738	155,815
Senior Unsecured Notes [Member]
Outstanding Long Term Debt	300,000	300,000
Unamortized Discount and Issuance Cost	(2,634)	(2,882)
Total debt	297,366	297,118
Term Loan [Member]
Outstanding Long Term Debt	223,750	223,750
Unamortized Discount and Issuance Cost	(3,552)	(1,630)
Total debt	$ 220,198	$ 222,120