Per Share Information (Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Share Computations) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Per Share Information
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 115,194	$ 98,366	$ 346,446	$ 232,263
Dividends on preferred stock	29,935	10,997	29,935	32,991
Net income (loss) attributable to CCIC common stockholders for basic and diluted computations	$ 85,259	$ 87,369	$ 316,511	$ 199,272
Basic weighted-average number of common stock outstanding	395,359,000	337,564,000	373,561,000	336,426,000
Effect of assumed dilution from potential common shares relating to restricted stock units and restricted stock awards	1,676,000	845,000	1,431,000	650,000
Diluted weighted-average number of common shares outstanding	397,035,000	338,409,000	374,992,000	337,076,000
Basic	$ 0.22	$ 0.26	$ 0.85	$ 0.59
Diluted	$ 0.21	$ 0.26	$ 0.84	$ 0.59