CONSOLIDATED STATEMENTS OF EQUITY (USD $)	Common Stock [Member]	Capital In Excess Of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Beginning balance at Dec. 31, 2011	$ 129,245,000	$ 2,544,740,000	$ 1,334,476,000	$ (216,844,000)	$ 3,791,617,000
Beginning balance (in shares) at Dec. 31, 2011	129,245,000
Net earnings (loss)	0	0	(52,593,000)	0	(52,593,000)
Common stock issued
Acquisitions (in shares)	61,000
Acquisitions	61,000	(199,000)	0	0	(138,000)
401(k) Trustee (Note 13) (in shares)					0
Share-based compensation plans (in shares)	415,000
Share-based compensation plans	415,000	7,113,000	0	0	7,528,000
Share-based compensation expense	0	17,474,000	0	0	17,474,000
Excess tax benefits from share-based compensation	0	267,000	0	0	267,000
Reclass deferred compensation liability to equity (Note 13)	0	10,764,000	0	0	10,764,000
Cash dividends on common stock	0	0	(5,183,000)	0	(5,183,000)
Other comprehensive income (loss)	0	0	0	(8,673,000)	(8,673,000)
Other	0	50,000	(51,000)	0	(1,000)
Ending balance at Dec. 31, 2012	129,721,000	2,580,209,000	1,276,649,000	(225,517,000)	3,761,062,000
Ending balance (in shares) at Dec. 31, 2012	129,721,000
Net earnings (loss)	0	0	24,382,000	0	24,382,000
Common stock issued
401(k) Trustee (Note 13) (in shares)	71,000				71,208
401(k) Trustee (Note 13)	71,000	3,750,000	0	0	3,821,000
Share-based compensation plans (in shares)	408,000
Share-based compensation plans	408,000	5,485,000	0	0	5,893,000
Share-based compensation expense	0	22,093,000	0	0	22,093,000
Excess tax benefits from share-based compensation	0	161,000	0	0	161,000
Cash dividends on common stock	0	0	(5,191,000)	0	(5,191,000)
Other comprehensive income (loss)	0	0	0	125,886,000	125,886,000
Other	0	5,000	(6,000)	0	(1,000)
Ending balance at Dec. 31, 2013	130,200,000	2,611,703,000	1,295,834,000	(99,631,000)	3,938,106,000
Ending balance (in shares) at Dec. 31, 2013	130,200,000
Net earnings (loss)	0	0	204,923,000	0	204,923,000
Common stock issued
Acquisitions (in shares)	715,000				715,004
Acquisitions	715,000	44,470,000	0	0	45,185,000
401(k) Trustee (Note 13) (in shares)	485,000				485,306
401(k) Trustee (Note 13)	485,000	30,135,000	0	0	30,620,000
Share-based compensation plans (in shares)	507,000
Share-based compensation plans	507,000	20,982,000	0	0	21,489,000
Share-based compensation expense	0	23,884,000	0	0	23,884,000
Excess tax benefits from share-based compensation	0	3,464,000	0	0	3,464,000
Cash dividends on common stock	0	0	(28,884,000)	0	(28,884,000)
Other comprehensive income (loss)	0	0	0	(62,083,000)	(62,083,000)
Other	0	23,000	(28,000)	0	(5,000)
Ending balance at Dec. 31, 2014	$ 131,907,000	$ 2,734,661,000	$ 1,471,845,000	$ (161,714,000)	$ 4,176,699,000
Ending balance (in shares) at Dec. 31, 2014	131,907,000