Quarterly report pursuant to Section 13 or 15(d)

Non-Controlling Interest - Analysis of Controlling and Non-Controlling Interest (Detail)

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Non-Controlling Interest - Analysis of Controlling and Non-Controlling Interest (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 5 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Noncontrolling Interest [Line Items]      
Beginning Balance   $ 161,838 $ 150,624
Net income (loss) attributable to interest holders   (3,219) 8,290
Issuance of common stock     70,370
Redemption of OP units (200)   (1,782)
Repurchase of common stock     (205)
Equity-based compensation   6,629 3,627
Distributions   (1,020) (13,864)
Change in accumulated other comprehensive income   (164) 690
Tax basis difference on contributed asset     1,857
Ending Balance 219,607 164,064 219,607
Controlling Interest [Member]
      
Noncontrolling Interest [Line Items]      
Beginning Balance   161,838 146,525
Establishment of non-controlling interest during formation transaction   (4,407)  
Net income (loss) attributable to interest holders   (3,129) 8,145
Issuance of common stock     70,370
Redemption of OP units     (617)
Repurchase of common stock     (205)
Equity-based compensation   6,449 3,575
Distributions   (992) (13,639)
Change in accumulated other comprehensive income   (160) 678
Tax basis difference on contributed asset     1,818
Redemption value change for non-controlling interest redeemable for cash     (1,833)
Ending Balance 214,817 159,599 214,817
Non-Controlling Interest Holders [Member]
      
Noncontrolling Interest [Line Items]      
Beginning Balance     4,099
Establishment of non-controlling interest during formation transaction   4,407  
Net income (loss) attributable to interest holders   (90) 145
Redemption of OP units     (1,165)
Equity-based compensation   180 52
Distributions   (28) (225)
Change in accumulated other comprehensive income   (4) 12
Tax basis difference on contributed asset     39
Redemption value change for non-controlling interest redeemable for cash     1,833
Ending Balance $ 4,790 $ 4,465 $ 4,790