Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) shares
Condensed Consolidated Statement of Changes in Stockholders' Equity
Issuance of common stock for director stock option exercises, shares	24,498
Issuance of common stock for restricted share awards, shares	1,031,831
Net excess tax benefit | $	$ 0.3
Issuance of common stock for the employee stock purchase plan, shares	50,387
Shares repurchased to satisfy minimum statutory withholding tax upon the net settlement of equity awards	375,324
Shares Repurchased Under Board Authorization	909,682