Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Details)

v3.8.0.1
Shareholders' Equity (Details) - USD ($)
shares in Thousands
9 Months Ended 18 Months Ended
Sep. 30, 2017
Aug. 28, 2017
Feb. 24, 2016
Class of Stock [Line Items]      
Authorized repurchase of common stock, amount     $ 50,000,000
Treasury Stock      
Class of Stock [Line Items]      
Number of shares repurchased (in shares) 1,152 1,675  
Repurchase of shares $ 32,382,000 $ 50,000,000