• Filing Date: 2017-02-22
  • Form Type: 10-K
  • Description: Annual report
v3.6.0.2
Fair Value Measurements - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Aug. 16, 2016
Jan. 14, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
ADC Arrangement Under the ADC Arrangement, the Company provided financing to the property developer for the acquisition, development, and construction of a retail shopping center. The Company also expected to participate in the residual profit resulting from the ultimate sale or other use of the property. Classification and accounting for the ADC Arrangement as a loan, an investment in real estate, or a joint venture was determined by the Company’s evaluation of the characteristics and the risks and rewards of the ADC Arrangement. Because the Company expected to receive more than 50% of the residual profit from the ADC Arrangement which had characteristics similar to a real estate investment, the costs of the real estate project were capitalized and interest was recognized in net investment income.      
Fair value transfers between Level 1, 2 or 3 $ 0 $ 0    
ADC Arrangement [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
ADC Arrangement Based on the characteristics of this ADC Arrangement, which were similar to those of an investment, combined with the expected residual profit being greater than 50%, the arrangement was accounted for and reported in the balance sheet      
Senior Notes [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fixed annual rate of interest 8.00%      
Debt instrument, maturity year 2020      
Convertible Senior Notes [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Debt instrument, maturity year 2019      
Debt instrument stated interest rate 3.875%      
4% Promissory Note [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Debt instrument, maturity year 2031      
Debt instrument stated interest rate 4.00%     4.00%
3.75% Promissory Note [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Debt instrument stated interest rate 3.75%   3.75%  
3.75% Promissory Note [Member] | Maximum [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Debt instrument, maturity year 2036