Certain Relationships And Related Party Transactions (Narrative) (Detail) - USD ($) $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 02, 2015	Jan. 31, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Aug. 09, 2010
Certain Relationships And Related Party Transactions [Abstract]
Management agreement maturity date					2018
Management fee, rate per year					$ 15.0
Management fees and reimbursable expenses			$ 3.9	$ 3.7	$ 7.8	$ 7.7
Common Class A [Member]
Certain Relationships And Related Party Transactions [Abstract]
Total authorized stock repurchase amount							$ 34.2	$ 100.0
CC Finco, LLC [Member] | Common Class A [Member]
Certain Relationships And Related Party Transactions [Abstract]
Shares purchase amout during the period		2,000,000
Shares purchased during the period, value	$ 22.2	$ 20.4
Additional shares purchased	2,172,946
Collective Holdings Percentage Of Oustanding Shares	90.00%