Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Income from continuing operations	$ 12,285	$ 2,920	$ 188,088	$ 17,857
Income from continuing operations available for common stockholders	12,067	2,920	184,907	17,857
Income from discontinued operations	0	8,737	0	24,361
Net income available for common stockholders	$ 12,067	$ 11,657	$ 184,907	$ 42,218
Denominator:
Weighted average common shares - basic	419,998	210,170	414,123	210,400
Income from continuing operations available for common stockholders (in usd per share)	$ 0.03	$ 0.01	$ 0.45	$ 0.08
Income from discontinued operations available for common stockholders (in usd per share)	0.00	0.05	0.00	0.12
Earnings per common share - basic (in usd per share)	$ 0.03	$ 0.06	$ 0.45	$ 0.20
Numerator:
Income from continuing operations	$ 12,285	$ 2,920	$ 188,088	$ 17,857
Income from continuing operations available for common stockholders before net income attributable to noncontrolling interests in CPLP	12,280	2,920	188,077	17,857
Income from discontinued operations available for common stockholders	0	8,737	0	24,361
Net income available for common stockholders before net income attributable to noncontrolling interests in CPLP	$ 12,280	$ 11,657	$ 188,077	$ 42,218
Denominator:
Weighted average shares — basic	419,998	210,170	414,123	210,400
Add:
Potential dilutive common shares - stock options	328	156	320	128
Weighted average units of CPLP convertible into common shares	6,974	0	7,511	0
Weighted average common shares - diluted	427,300	210,326	421,954	210,528
Income from continuing operations available for common stockholders before net income attributable to noncontrolling interests in CPLP (in usd per share)	$ 0.03	$ 0.01	$ 0.45	$ 0.08
Income from discontinued operations available for common stockholders (in usd per share)	0.00	0.05	0.00	0.12
Earnings per common share - diluted (in usd per share)	$ 0.03	$ 0.06	$ 0.45	$ 0.20
Stock Option
Add:
Weighted average anti-dilutive stock options outstanding (in shares)	731	1,103	740	1,110
CPLP
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	$ (213)	$ 0	$ (3,170)	$ 0
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	(213)	0	(3,170)	0
Other Noncontrolling Interests
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	(5)	0	(11)	0
Numerator:
Net income attributable to other noncontrolling interests from continuing operations	$ (5)	$ 0	$ (11)	$ 0