Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v3.10.0.1
Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Allowances on accounts receivable, current $ 4,757 $ 4,465
Accumulated depreciation on property and equipment 1,042,815 981,275
Accumulated amortization on other intangible assets $ 352,520 $ 335,507
Common stock, par value (in usd per share) $ 0.00001 $ 0.00001
Common stock, shares authorized (in shares) 600,000,000 600,000,000
Common stock, shares issued (in shares) 156,934,020 155,219,154
Common stock, shares outstanding (in shares) 149,088,134 153,342,326
Treasury stock, common shares (in shares) 7,845,886 1,876,828
Exchangeable Shares    
Common stock, shares issued (in shares) 486,112 486,112
Common stock, shares outstanding (in shares) 486,112 486,112
Exchangeable shares, par value (in usd per share) $ 0 $ 0
Series G Preferred Stock    
Preferred stock, par value (in usd per share) $ 0.00001 $ 0.00001
Preferred stock, shares authorized (in shares) 1 1
Preferred stock, shares issued (in shares) 1 1
Preferred stock, shares outstanding (in shares) 1 1