Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Reconciliation of Changes in Parent Company's Total Shareholders' Equity (Detail)

v3.20.2
Shareholders' Equity - Reconciliation of Changes in Parent Company's Total Shareholders' Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Beginning Balance $ 2,147,719 $ 2,132,894 $ 2,046,891 $ 2,057,737 $ 2,132,894 $ 2,057,737
Issuance of non-vested stock     1      
Net proceeds from issuance of common stock   21,466        
Earned portion of non-vested stock 1,071 1,124 839 1,396    
Adjustment to redemption value on noncontrolling redeemable Operating Partnership units (2,609) 5,542 (150) (294) 2,933  
Net income attributable to common shareholders 36,457 36,433 40,742 34,454 72,890 75,196
Amortization of terminated hedge included in AOCL 229 229 229 229    
Dividends (50,186) (49,969) (46,632) (46,631)    
Ending Balance 2,132,681 2,147,719 2,041,920 2,046,891 2,132,681 2,041,920
Common Stock Shares [Member]            
Beginning Balance 469 467 466 466 467 466
Issuance of non-vested stock     1      
Net proceeds from issuance of common stock   2        
Ending Balance 469 469 467 466 469 467
Additional Paid-in Capital [Member]            
Beginning Balance 2,399,311 2,376,723 2,373,553 2,372,157 2,376,723 2,372,157
Net proceeds from issuance of common stock   21,464        
Earned portion of non-vested stock 1,071 1,124 839 1,396    
Ending Balance 2,400,382 2,399,311 2,374,392 2,373,553 2,400,382 2,374,392
Dividends in Excess of Net Income [Member]            
Beginning Balance (246,332) (238,338) (320,482) (308,011) (238,338) (308,011)
Adjustment to redemption value on noncontrolling redeemable Operating Partnership units (2,609) 5,542 (150) (294)    
Net income attributable to common shareholders 36,457 36,433 40,742 34,454    
Dividends (50,186) (49,969) (46,632) (46,631)    
Ending Balance (262,670) (246,332) (326,522) (320,482) (262,670) (326,522)
Accumulated Other Comprehensive Income (Loss) [Member]            
Beginning Balance (5,729) (5,958) (6,646) (6,875) (5,958) (6,875)
Amortization of terminated hedge included in AOCL 229 229 229 229    
Ending Balance $ (5,500) $ (5,729) $ (6,417) $ (6,646) $ (5,500) $ (6,417)