Transactions with Related Parties (Schedule Of Transactions With Related Parties) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quintana Group [Member]
Related Party Transaction [Line Items]
Related party transaction, expenses	$ 0	$ 6,260	$ 3,568	[1]
Chief Executive Officer [Member]
Related Party Transaction [Line Items]
Related party transaction, expenses	600	600	316
Sandhill [Member]
Related Party Transaction [Line Items]
Related party transaction, revenues	3,076	2,905	2,481	[1],[2]
Davison [Member]
Related Party Transaction [Line Items]
Related party transaction, revenues	$ 1,293	$ 1,344	$ 1,207	[1]
Sandhill Group, LLC [Member]
Related Party Transaction [Line Items]
Ownership percentage	50.00%

[1] We own a 50% interest in Sandhill Group, LLC (or "Sandhill).

[2] Amounts included in discontinued operations for all periods presented.