Quarterly report pursuant to Section 13 or 15(d)

EQUITY (Antidilutive Securities Excluded from Computation of Earnings per Share) (Details)

v3.19.2
EQUITY (Antidilutive Securities Excluded from Computation of Earnings per Share) (Details) - shares
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 9,898,604 12,185,289 9,937,949 12,144,062
Options to purchase shares of common stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 486,849 604,781 486,849 604,781
Restricted and deferred stock awards - unvested [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 1,326,480 2,668,381 1,365,825 2,627,154
Conversion shares related to the convertible senior notes [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 8,085,275 8,912,127 8,085,275 8,912,127