Earnings Per Share (Computation of Basic and Diluted Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Income from continuing operations	$ 80,765	$ 219,959	$ 60,941
Income from continuing operations available for common stockholders	79,164	216,275	59,946
Income from discontinued operations	0	0	19,163
Net income available for common stockholders	$ 79,164	$ 216,275	$ 79,109
Denominator:
Weighted average common shares - basic (in shares)	420,305	415,610	253,895
Income from continuing operations available for common stockholders (in usd per share)	$ 0.19	$ 0.52	$ 0.24
Income from discontinued operations available for common stockholders (in usd per share)	0.00	0.00	0.07
Net income available to common stockholders (in usd per share)	$ 0.19	$ 0.52	$ 0.31
Numerator:
Income from continuing operations	$ 80,765	$ 219,959	$ 60,941
Income from continuing operations available for common stockholders	80,509	219,956	60,730
Income from discontinued operations	0	0	19,163
Net income available for common stockholders before net income attributable to noncontrolling interests in CPLP	$ 80,509	$ 219,956	$ 79,893
Denominator:
Weighted average common shares - basic (in shares)	420,305	415,610	253,895
Add:
Potential dilutive common shares - stock options (in shares)	194	312	178
Weighted average units of CPLP convertible into common shares (in shares)	6,974	7,375	1,950
Weighted average common shares - diluted (in shares)	427,473	423,297	256,023
Income from continuing operations available for common stockholders (in usd per share)	$ 0.19	$ 0.52	$ 0.24
Income from discontinued operations available for common stockholders (in usd per share)	0.00	0.00	0.07
Net income available to common stockholders (in usd per share)	$ 0.19	$ 0.52	$ 0.31
CPLP
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	$ 1,345	$ (3,681)	$ (784)
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	1,345	(3,681)	(784)
Other Noncontrolling Interests
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	256	(3)	(211)
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	$ 256	$ (3)	$ (211)