Quarterly report pursuant to Section 13 or 15(d)

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

v3.4.0.3
Shareholders' Equity - Reconciliation of Changes in Total Shareholders' Equity (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Equity [Abstract]    
Beginning balance $ 1,202,315  
Net proceeds from the issuance of common stock 274,298  
Exercise of stock options 0  
Earned portion of non-vested stock 1,866  
Stock option expense 46 $ 36
Deferred compensation - directors 23  
Adjustment to redemption value on noncontrolling redeemable Operating Partnership units (1,584)  
Net income attributable to common shareholders 28,339 22,451
Change in fair value of derivatives (12,096) $ (3,987)
Dividends (31,204)  
Ending balance $ 1,462,003