Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

v3.19.3
Stockholders' Equity (Details) - USD ($)
1 Months Ended 12 Months Ended
May 29, 2018
May 31, 2014
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jun. 05, 2018
Jun. 04, 2018
Apr. 28, 2017
Class of Stock [Line Items]                  
Gross proceeds     $ 441,901,000 $ 0 $ 0        
Stock issuance costs $ 16,900,000                
Common stock, shares authorized (in shares)     250,000,000 125,000,000     250,000,000 125,000,000  
Stock repurchase program, extension of period in force   1 year       1 year      
Common Stock                  
Class of Stock [Line Items]                  
Amount authorized to be repurchased   $ 50,000,000             $ 100,000,000.0
Number of shares repurchased (in shares)     599,664 0 1,012,823        
Weighted average cost per share (in dollars per share)     $ 46.83 $ 0.00 $ 20.98        
Stock repurchased during period     $ 28,082,000 $ 0 $ 21,244,000        
Public Stock Offering                  
Class of Stock [Line Items]                  
Public offering (in shares) 8,050,000                
Gross proceeds $ 458,900,000                
Net proceeds received $ 441,900,000                
Over-Allotment Option                  
Class of Stock [Line Items]                  
Public offering (in shares) 1,050,000                
Offering price (in dollars per share) $ 57