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Transactions With Related Parties (Schedule Of Transactions With Related Parties) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Quintana Group [Member]
Related Party Transaction [Line Items]
Related party transaction, expenses	$ 0	$ 1,980	$ 0	$ 6,181
Related party transaction, revenues	0	6,376	0	21,142
Sandhill [Member]
Related Party Transaction [Line Items]
Related party transaction, revenues	863	838	2,344	2,111
Davision [Member]
Related Party Transaction [Line Items]
Related party transaction, revenues	399	326	1,043	1,012
Chief Executive Officer [Member]
Related Party Transaction [Line Items]
Related party transaction, expenses	$ 150	$ 150	$ 450	$ 450
Sandhill Group Llc [Member]
Related Party Transaction [Line Items]
Percentage of interest held	50.00%		50.00%

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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