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Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2011
Stock issued for benefit plans (shares)	104,890	50,987
Options exercised, shares	0	63,040
Purchase of treasury shares (shares)	89,566	86,812
Employee stock purchase plan (shares)	72,273	42,624
Issuance of restricted stock (shares)	338,372	375,157

Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan.

Number of shares issued during the period as a result of an employee stock purchase plan.

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.