Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Stock issued for benefit plans (shares)	154,665	104,890
Options exercised (shares)	0	1,125
Purchase of treasury stock (shares)	71,112	98,020
Employee stock purchase plan (shares)	71,825	72,273
Issuance of restricted stock (shares)	247,648	391,581