XML 168 R47.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Measurements - Additional Information (Detail) (USD $)
6 Months Ended
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Fair Value Measurements Of Financial Instruments [Line Items]            
Fluctuation in discount rate 1.00%          
Estimated market participant cost to collect 48.00%          
Discount rate 12.00%          
Carrying value of investment in receivable portfolios $ 1,096,698,000 $ 801,525,000 $ 873,119,000 $ 869,859,000 $ 741,580,000 $ 716,454,000
Convertible senior notes, Carrying Value 265,000,000   115,000,000      
Convertible senior notes, debt discount 41,233,000   14,442,000      
Fair value estimate of convertible senior notes incorporates quoted market prices 286,100,000   128,300,000      
Cost to collect [Member]
           
Fair Value Measurements Of Financial Instruments [Line Items]            
Increase or decrease of the fair value 21,600,000          
Discount rate [Member]
           
Fair Value Measurements Of Financial Instruments [Line Items]            
Increase or decrease of the fair value $ 20,700,000