CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock Par Value [Member]	Capital in Excess of Par Value [Member]	Retained Earnings/(Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Stockholder's Equity [Member]	Noncontrolling Interest ("NCI") [Member]
Beginning Balance at Dec. 31, 2014					$ (97,808)
Net income	$ 9,176
Other comprehensive income (loss), net of tax	(6,357)
Ending Balance at Sep. 30, 2015					(104,085)
Beginning Balance at Jun. 30, 2015					(94,024)
Net income	7,534
Other comprehensive income (loss), net of tax	(10,061)
Ending Balance at Sep. 30, 2015					(104,085)
Beginning Balance at Dec. 31, 2015	1,546,721	$ 246,841	$ 1,687,059	$ (260,884)	(93,955)	$ (92,262)	$ 1,486,799	$ 59,922
Net income	35,753			34,593			34,593	1,160
Other comprehensive income (loss), net of tax	26,591				26,623		26,623	(32)
Common stock issued		3,235	(3,235)
Stock-based compensation charges	8,329		8,329				8,329
Purchase of treasury shares	(3,909)					(3,909)	(3,909)
Retirement of common stock		(447)	(832)			1,279
Purchase of shares from NCI	(17,182)		597				597	(17,779)
Ending Balance at Sep. 30, 2016	1,596,303	249,629	1,691,918	(226,291)	(67,332)	(94,892)	1,553,032	43,271
Beginning Balance at Jun. 30, 2016					(65,875)
Net income	16,392
Other comprehensive income (loss), net of tax	(1,468)
Ending Balance at Sep. 30, 2016	$ 1,596,303	$ 249,629	$ 1,691,918	$ (226,291)	$ (67,332)	$ (94,892)	$ 1,553,032	$ 43,271