Common Stock	3 Months Ended
Mar. 31, 2017
Equity [Abstract]
Common Stock	Common Stock Secondary Offering and Stock Repurchase In March 2016, certain selling stockholders affiliated with Silver Point Capital, L.P., Oak Hill Advisors, L.P. and Capital World Investors (the “Selling Stockholders”) sold 2,278,031 shares, including overallotments, of the Company’s common stock at a public offering price of $68.00 per share, in a secondary public offering. Of the 2,278,031 shares sold in the offering, 350,000 shares were purchased by the Company for $23,800. The Company paid the underwriting discounts and commissions payable on the shares sold by the Selling Stockholders, excluding the shares the Company repurchased, resulting in $5,900 of fees incurred for the three months ended March 31, 2016, which is included in other expense, net in the condensed consolidated statement of net income. The Company also incurred approximately $600 of other expenses related to legal and audit services for the three months ended March 31, 2016, which is included in selling, administration & engineering expenses in the condensed consolidated statement of net income. The Company did not sell or receive any proceeds from the sales of shares by the Selling Stockholders.

Common Stock

Secondary Offering and Stock Repurchase

In March 2016, certain selling stockholders affiliated with Silver Point Capital, L.P., Oak Hill Advisors, L.P. and Capital World Investors (the “Selling Stockholders”) sold 2,278,031 shares, including overallotments, of the Company’s common stock at a public offering price of $68.00 per share, in a secondary public offering. Of the 2,278,031 shares sold in the offering, 350,000 shares were purchased by the Company for $23,800. The Company paid the underwriting discounts and commissions payable on the shares sold by the Selling Stockholders, excluding the shares the Company repurchased, resulting in $5,900 of fees incurred for the three months ended March 31, 2016, which is included in other expense, net in the condensed consolidated statement of net income. The Company also incurred approximately $600 of other expenses related to legal and audit services for the three months ended March 31, 2016, which is included in selling, administration & engineering expenses in the condensed consolidated statement of net income. The Company did not sell or receive any proceeds from the sales of shares by the Selling Stockholders.