Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2016

Restricted Stock Units (RSUs) [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Activity Related to Restricted Stock Units

A summary of activity related to restricted stock units (“RSUs”) during the three month period ended March 31, 2016, is presented below: 

	Unvested Shares
Outstanding at December 31, 2015	1,007,301
Granted	281,691
Forfeited	(9,665)
Vested and Issued	(395,856)
Vested and Unissued	(27,362)
Outstanding at March 31, 2016	856,109

Performance Shares [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Performance-Based Restricted Stock Units Activity and Related Information

A summary of activity related to performance-based restricted stock units (“PSUs”) during the three month period ended March 31, 2016, is presented below: 

	Unvested Shares
Outstanding at December 31, 2015	293,413
Granted	144,644
Vested and Issued	(45,701)
Outstanding at March 31, 2016	392,356