Quarterly report pursuant to Section 13 or 15(d)

Mandatorily Redeemable Preferred Stock - Additional Information (Detail)

v3.5.0.2
Mandatorily Redeemable Preferred Stock - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 6 Months Ended
Jun. 30, 2016
Feb. 29, 2012
Jun. 30, 2016
Jul. 12, 2016
Dec. 31, 2015
Class of Stock [Line Items]          
Redeemable preferred stock, shares issued 2,264,000   2,264,000   2,150,000
Preferred shares at a redemption price (in dollars per share)   $ 25.00      
Preferred Stock mandatory redemption date   Jan. 31, 2017      
Deferred financing costs   $ 1,800      
Payments for Repurchase of Redeemable Preferred Stock $ 25,000   $ 25,000    
Wrote-off of deferred offering costs 100        
Carrying value Term Preferred Stock 2   2   $ 2
Deferred financing costs, net (5,700)   (5,700)   $ 0
Mandatorily Redeemable Preferred Stock [Member]          
Class of Stock [Line Items]          
Redeemable preferred stock, shares issued   1,540,000      
Redeemable preferred stock, par value (in dollars per share)   $ 0.001      
Public offering price   $ 25.00      
Gross proceeds of the offering   $ 38,500      
Net proceeds, after deducting offering expenses   $ 36,700      
Fair value of Term Preferred Stock 13,600   13,600    
Deferred financing costs, net $ 100   $ 100    
Closing price of Term Preferred Stock $ 25.20   $ 25.20    
Series C Preferred Stock [Member]          
Class of Stock [Line Items]          
Redeemable preferred stock, dividend rate percentage   7.125%      
Series C Preferred Stock [Member] | Mandatorily Redeemable Preferred Stock [Member]          
Class of Stock [Line Items]          
Redeemable preferred stock, shares issued 540,000   540,000   1,540,000
Redeemable preferred stock, par value (in dollars per share) $ 0.001   $ 0.001   $ 0.001
Subsequent Event [Member]          
Class of Stock [Line Items]          
Preferred shares at a redemption price (in dollars per share)       $ 25.00  
Preferred stock to be redeemed (in shares)       540,000