Common Stock (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Schedule of reconciliation of changes in common shares issued

A reconciliation of changes in common shares issued during the six months ended June 30, 2018 is as follows:

Shares issued at December 31, 2017	60,622,986
Issued as restricted stock award grants	1,018,539
Shares issued at June 30, 2018	61,641,525