CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Parent Cumulative Effect of Adoption	Parent As Adjusted Balance	Parent	Common Stock As Adjusted Balance	Common Stock	Capital in Excess of Par Value As Adjusted Balance	Capital in Excess of Par Value	Cumulative Net Income Cumulative Effect of Adoption	Cumulative Net Income As Adjusted Balance	Cumulative Net Income	Accumulated Other Comprehensive Income (Loss)	Cumulative Distributions As Adjusted Balance	Cumulative Distributions	Non-controlling Interests As Adjusted Balance	Non-controlling Interests	Cumulative Effect of Adoption	As Adjusted Balance	Total
Balance at beginning of period at Dec. 31, 2018	$ (42,808)	$ 782,682	$ 825,490	$ 397	$ 397	$ 862,712	$ 862,712	$ (42,808)	$ 1,212,956	$ 1,255,764		$ (1,293,383)	$ (1,293,383)	$ 7,481	$ 7,481	$ (42,808)	$ 790,163	$ 832,971
Balance (in shares) at Dec. 31, 2018				39,657	39,657
Equity activity
Issuance of restricted stock			(7)				(7)											(7)
Issuance of restricted stock (in shares)					86
Net income			80,526							80,526					346			80,872
Stock-based compensation expense			6,566				6,566											6,566
Vesting of performance-based stock units, including the payment of distributions			(301)										(301)					(301)
Vesting of performance-based stock units, including the payment of distributions (in shares)					48
Stock option exercises			123		$ 1		122											123
Stock option exercises (in shares)					5
Non-controlling interests contributions															965			965
Non-controlling interest distributions															(309)			(309)
Common stock cash distributions			(90,599)										(90,599)					(90,599)
Other			(2,047)				(2,047)											(2,047)
Other (in shares)					(44)
Balance (in shares) at Dec. 31, 2019					39,752
Balance at end of period at Dec. 31, 2019			776,943		$ 398		867,346			1,293,482			(1,384,283)		8,483			785,426
Equity activity
Repurchase of common stock			(18,012)		$ (6)		(18,006)											(18,012)
Repurchase of common stock (in shares)					(616)
Issuance of restricted stock			(8)		$ 1		(9)											(8)
Issuance of restricted stock (in shares)					101
Net income			95,293							95,293					384			95,677
Stock-based compensation expense			7,012				7,012											7,012
Vesting of performance-based stock units, including the payment of distributions			(586)										(586)					(586)
Vesting of performance-based stock units, including the payment of distributions (in shares)					82
Non-controlling interest distributions															(463)			(463)
Common stock cash distributions			(89,676)										(89,676)					(89,676)
Other			(3,564)		$ (1)		(3,563)											(3,564)
Other (in shares)					(77)
Balance (in shares) at Dec. 31, 2020					39,242
Balance at end of period at Dec. 31, 2020			767,402		$ 392		852,780			1,388,775			(1,474,545)		8,404			775,806
Equity activity
Net income			55,861							55,861					363			56,224
Stock-based compensation expense			7,760				7,760											7,760
Vesting of performance-based stock units, including the payment of distributions			(764)		$ 1		(1)						(764)					(764)
Vesting of performance-based stock units, including the payment of distributions (in shares)					109
Non-controlling interests contributions															9			9
Non-controlling interest distributions															(363)			(363)
Common stock cash distributions			(89,730)										(89,730)					(89,730)
Cash paid for taxes in lieu of common shares			(3,573)				(3,573)											(3,573)
Cash paid for taxes in lieu of common shares (in shares)					(87)
Fair market valuation adjustment for interest rate swap			(172)								$ (172)							(172)
Other			(70)		$ 1		(71)											(70)
Other (in shares)					110
Balance (in shares) at Dec. 31, 2021					39,374
Balance at end of period at Dec. 31, 2021			$ 736,714		$ 394		$ 856,895			$ 1,444,636	$ (172)		$ (1,565,039)		$ 8,413			$ 745,127