COMMON STOCK - Repurchase of Shares of Common Stock (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Equity [Abstract]
Number of Shares Repurchased and Canceled	527,243	685,990	540,390	74,820	1,213,233	615,210
Amount Paid for Repurchases	$ 58,846	$ 78,340	$ 59,015	$ 7,160	$ 137,186	$ 66,175	$ 163,700
Average Price Paid per Share	$ 111.61	$ 114.20	$ 109.21	$ 95.70	$ 113.08	$ 107.57