Stockholders' Equity - Stock Repurchase Plan (Details) - USD ($)	3 Months Ended	30 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Jan. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares repurchased (in shares)	0
2015 Stock Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum stock repurchase amount approved by Board of Directors			$ 200,000,000
Shares purchased since inception (in shares)		2,020,000,000
Repurchased stock value		$ 134,706,000
Repurchased stock acquired average cost per share		$ 66.69
Remaining authorized repurchase amount	$ 65,294,000	$ 65,294,000