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, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income	$ 152,683	$ 80,765	$ 219,959
Net income attributable to noncontrolling interests	(2,265)	(1,601)	(3,684)
Net income available to common stockholders	$ 150,418	$ 79,164	$ 216,275
Denominator:
Weighted average common shares - basic (in shares)	128,060	105,076	103,902
Net income available to common stockholders (in usd per share)	$ 1.17	$ 0.75	$ 2.08
Numerator:
Net income	$ 152,683	$ 80,765	$ 219,959
Net income attributable to noncontrolling interests	(2,265)	(1,601)	(3,684)
Net income available for common stockholders before net income attributable to noncontrolling interests in CPLP	$ 152,370	$ 80,509	$ 219,956
Denominator:
Weighted average common shares - basic (in shares)	128,060	105,076	103,902
Add:
Potential dilutive common shares - stock options (in shares)	27	48	78
Weighted average units of CPLP convertible into common shares (in shares)	1,744	1,744	1,844
Weighted average common shares - diluted (in shares)	129,831	106,868	105,824
Net income available to common stockholders (in usd per share)	$ 1.17	$ 0.75	$ 2.08
CPLP
Numerator:
Net income attributable to noncontrolling interests	$ (1,952)	$ (1,345)	$ (3,681)
Numerator:
Net income attributable to noncontrolling interests	(1,952)	(1,345)	(3,681)
Other Noncontrolling Interests
Numerator:
Net income attributable to noncontrolling interests	(313)	(256)	(3)
Numerator:
Net income attributable to noncontrolling interests	$ (313)	$ (256)	$ (3)