XML 28 R17.htm IDEA: XBRL DOCUMENT

Credit Agreement	6 Months Ended
Credit Agreement	Jun. 30, 2017
Debt Disclosure [Abstract]
Credit Agreements	Credit Agreement On February 8, 2011, the Company entered into a credit agreement with Bank of America, N.A., U.S. Bank National Association, JPMorgan Chase Bank N.A. and other lenders, as amended on April 5, 2013, October 27, 2015 and May 31, 2016 (the "Credit Agreement") which provides for a $500 million revolving line of credit. At June 30, 2017, the Company had $86.3 million outstanding under its revolving credit facility pursuant to the Credit Agreement and had $18.2 million of letters of credit outstanding, which reduces the total available revolving credit under the Credit Agreement to $395.5 million.