XML 83 R66.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stockholders' Equity - Changes in Common Stock Issued and Outstanding (Details)
12 Months Ended
Dec. 31, 2018
shares
Changes in Common Stock Outstanding [Roll Forward]  
Common stock, shares issued (in shares) 62,721,698
Treasury stock, common, (in shares) 11,632,276
Common stock, shares outstanding (in shares) 51,089,422
Acquisition of GEODynamics (in shares) 8,661,083
Restricted stock awards, net of forfeitures (in shares) 371,156
Shares withheld for taxes on vesting of restricted stock awards (in shares) (151,966)
Common stock, shares issued (in shares) 71,753,937
Treasury stock, common, (in shares) 11,784,242
Common stock, shares outstanding (in shares) 59,969,695