Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Detail)

v2.4.0.8
Related-Party Transactions - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2013
Component
Sep. 30, 2012
Sep. 30, 2013
Component
Sep. 30, 2012
Dec. 31, 2012
Sep. 30, 2013
Dividend Paid [Member]
Sep. 30, 2012
Dividend Paid [Member]
Oct. 31, 2013
Dividend Paid [Member]
Subsequent Event [Member]
Sep. 30, 2013
Dividend Declared [Member]
Sep. 30, 2012
Dividend Declared [Member]
Sep. 30, 2013
Line of credit [Member]
Payment guarantee [Member]
Dec. 31, 2012
Line of credit [Member]
Payment guarantee [Member]
Sep. 30, 2013
Term loan [Member]
Payment guarantee [Member]
Dec. 31, 2012
Term loan [Member]
Payment guarantee [Member]
Sep. 30, 2013
MMC [Member]
Sep. 30, 2012
MMC [Member]
Sep. 30, 2013
MMC [Member]
Sep. 30, 2012
MMC [Member]
Related Party Transaction [Line Items]                                    
Line of credit maturity date     Sep. 26, 2015                              
Term loan maturity date     Jun. 01, 2019                              
Number of components 2   2                              
Guarantee obligation, maximum amount of future payments $ 56,900   $ 56,900   $ 49,700           $ 39,400 $ 30,700 $ 17,500 $ 19,000        
Preferred stock dividends           31,181 15,654 6,500 6,500 0                
Payment under share service agreement 493 486 896 834                            
Insurance premiums incurred by MMC                             1,018 1,090 2,823 2,661
General and administrative expenses incurred by MMC                             112 112 501 470
Interest income earned from MMC                             0 35 74 95
Aggregate principal amount outstanding 384   384   1,157                          
Finance and brokerage services from transactions with MMC 0 394 382 1,013                            
Commission expenses for transactions with MMC 0 212 238 591                            
Rent expenses                             $ 109 $ 69 $ 289 $ 208
Lease expires date                                 Apr. 30, 2015