Summary of Significant Accounting Policies (Per Share Information) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income (loss) attributable to CCIC stockholders	$ 148,070	$ 106,937	$ 34,009	$ 101,497	$ (23,546)	$ 45,836	$ 52,359	$ 15,462	$ 390,513	$ 90,111	$ 188,584
Dividends on preferred stock									(43,988)	(11,363)	(2,629)
Net income (loss) attributable to CCIC common stockholders									$ 346,525	$ 78,748	$ 185,955
Weighted-average common shares outstanding:
Basic weighted-average number of common stock outstanding									332,302,000	298,083,000	289,285,000
Diluted weighted-average number of common shares outstanding									333,265,000	299,293,000	291,270,000
Net income (loss) attributable to CCIC common stockholders, after deduction of dividends on preferred stock, per common share:
Basic (in dollars per share)	$ 0.41	$ 0.29	$ 0.07	$ 0.27	$ (0.11)	$ 0.16	$ 0.18	$ 0.05	$ 1.04	$ 0.26	$ 0.64
Diluted (in dollars per share)	$ 0.41	$ 0.29	$ 0.07	$ 0.27	$ (0.11)	$ 0.16	$ 0.18	$ 0.05	$ 1.04	$ 0.26	$ 0.64
4.5% Mandatory Convertible Preferred Stock
Net income (loss) attributable to CCIC common stockholders, after deduction of dividends on preferred stock, per common share:
Antidilutive securities excluded from computation of earnings per share (in shares)									12,500,000	13,200,000
Stock Options and Restricted Stock Awards [Member]
Weighted-average common shares outstanding:
Effect of assumed dilution from potential common shares relating to stock options and restricted stock awards									963,000	1,210,000	1,985,000