Condensed Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015
Condensed Consolidated Statement of Changes in Stockholders' Equity
Issuance of common stock for employee stock option exercises, shares	46,024
Issuance of common stock for restricted share awards, shares	1,000,778
Increase in current taxes payable	$ 2.9
Issuance of common stock for the employee stock purchase plan, shares	35,692
Shares repurchased to satisfy minimum statutory withholding tax upon the net settlement of equity awards	374,454
Shares Repurchased Under Board Authorization	972,159
Dividend declared on common stock per share value	$ 0.07
Issuance of common stock for dividends, shares	(976)