COMMON STOCK AND PREFERRED STOCK (Tables)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Summary of Changes in Common Stock Issued and Treasury Stock

A summary of changes in common stock issued and treasury stock is presented below, as adjusted for the September 2014 stock split.

	Common Stock	Treasury Stock
Balance at December 31, 2011	99,172,396	8,154,720
Purchase of treasury stock	—	2,910,222
Issuance pursuant to stock option and stock-SARS plan	65,326	(1,685,492	)
Awards of restricted stock	—	(21,366	)
Issuance of deferred shares	—	(12,684	)
Balance at December 31, 2012	99,237,722	9,345,400
Purchase of treasury stock	—	20,349,510
Issuance pursuant to stock option and stock-SARS plan	213,782	(1,196,652	)
Awards of restricted stock	—	(20,790	)
Issuance of deferred shares	—	(34,720	)
Balance at December 31, 2013	99,451,504	28,442,748
Purchase of treasury stock	—	1,076,179
Issuance pursuant to stock option and stock-SARS plan	320,932	(753,967	)
Awards of restricted stock	—	(17,096	)
Issuance of deferred shares	—	(14,933	)
Balance at December 31, 2014	99,772,436	28,732,931