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Fair Value Disclosures - Carrying and Fair Values of Financial Instruments (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jun. 23, 2015
Notes, mortgage notes and other debt [Abstract]        
Stated interest rate (percent)       6.00%
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ (116,000) $ 0 $ 0  
7.50% Notes [Member]        
Notes, mortgage notes and other debt [Abstract]        
Stated interest rate (percent) 7.50%      
7.5% Senior Exchange Convertible Notes [Member]        
Notes, mortgage notes and other debt [Abstract]        
Stated interest rate (percent) 7.50%      
6.00% Notes [Member]        
Notes, mortgage notes and other debt [Abstract]        
Stated interest rate (percent) 6.00%      
Carrying Amount [Member]        
Notes, mortgage notes and other debt [Abstract]        
Contingent Consideration, Fair Value $ 7,083,000 2,404    
Carrying Amount [Member] | Notes and Senior Exchange Convertible Notes [Member]        
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]        
Notes Payable, Fair Value Disclosure 46,793,000 99,956,000    
Carrying Amount [Member] | 8.50% Senior Notes [Member]        
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]        
Notes Payable, Fair Value Disclosure 200,000,000 200,000    
Carrying Amount [Member] | 6.00% Notes [Member]        
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]        
Notes Payable, Fair Value Disclosure 79,930,000 0    
Estimate of Fair Value, Fair Value Disclosure [Member]        
Notes, mortgage notes and other debt [Abstract]        
Contingent Consideration, Fair Value 7,083,000 2,404    
Estimate of Fair Value, Fair Value Disclosure [Member] | Notes and Senior Exchange Convertible Notes [Member]        
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]        
Notes Payable, Fair Value Disclosure 45,389,000 99,040,000    
Estimate of Fair Value, Fair Value Disclosure [Member] | 8.50% Senior Notes [Member]        
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]        
Notes Payable, Fair Value Disclosure 199,000,000 193,000    
Estimate of Fair Value, Fair Value Disclosure [Member] | 6.00% Notes [Member]        
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]        
Notes Payable, Fair Value Disclosure 75,368,000 $ 0    
Minimum [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]        
Notes, mortgage notes and other debt [Abstract]        
Contingent Consideration, Fair Value 6,964,000      
Maximum [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]        
Notes, mortgage notes and other debt [Abstract]        
Contingent Consideration, Fair Value 7,106,000      
Bonterra and Royal Oak [Member]        
Notes, mortgage notes and other debt [Abstract]        
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ 218,000.0      
Fair Value, Inputs, Level 3 [Member] | Minimum [Member]        
Notes, mortgage notes and other debt [Abstract]        
Fair Value Inputs, Discount Rate 6.80%      
Fair Value, Inputs, Level 3 [Member] | Maximum [Member]        
Notes, mortgage notes and other debt [Abstract]        
Fair Value Inputs, Discount Rate 11.80%