CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2013	$ 906	$ 602,469	$ 989,451	$ (1,015,473)	$ 577,353
Balance (in shares) at Dec. 31, 2013	90,632
Increase (Decrease) in Stockholders' Equity
Net income			52,567		52,567
Cash dividends declared			(14,180)		(14,180)
Issuance of common stock from stock options exercised	4	8,616			8,620
Issuance of common stock from stock options exercised (in shares)	449
Tax impact of stock options exercised, net of cancellations		5,032			5,032
Stock-based compensation		7,836			7,836
Issuance of restricted stock, net of forfeitures	1				1
Issuance of restricted stock, net of forfeitures (in shares)	55
Treasury stock purchases				(123,187)	(123,187)
Payment for future treasury stock purchases under accelerated stock repurchase agreement		(4,904)			(4,904)
Balance at Jul. 01, 2014	$ 911	$ 619,049	$ 1,027,838	$ (1,138,660)	$ 509,138
Balance (in shares) at Jul. 01, 2014	91,136