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Equity-Based Compensation Schedule of Restricted Stock Transactions (Details) - Restricted Stock [Member]
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Unvested balance at beginning of period | shares 1,426,453
Shares granted | shares 1,509,384
Shares vested | shares (748,157)
Shares forfeited | shares (179,470)
Unvested balance at end of period | shares 2,008,210
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]  
Weighted average grant date fair value, beginning of period | $ / shares $ 31.02
Weighted average grant date fair value, grants | $ / shares 20.92
Weighted average grant date fair value, vested | $ / shares 30.33
Weighted average grant date fair value, forfeited | $ / shares 25.45
Weighted average grant date fair value, end of period | $ / shares $ 24.18