Reconciliation of Basic and Diluted Shares (Details 2) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restricted stock units
Antidilutive securities
Number of securities not included in computation of diluted earnings per share (in shares)	922	441	770	0
Stock options
Antidilutive securities
Number of securities not included in computation of diluted earnings per share (in shares)	90	90	90	101
Stock appreciation rights
Antidilutive securities
Number of securities not included in computation of diluted earnings per share (in shares)	1,567	1,265	1,432	1,156
Performance share units
Antidilutive securities
Number of securities not included in computation of diluted earnings per share (in shares)	801	322	649	265