STOCKHOLDERS’ EQUITY - Common Stock Repurchase Program and Dividends (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Authorized amount under stock repurchase program	$ 1,000,000		$ 1,000,000
Remaining authorized amount available for stock repurchase	$ 197,100		$ 197,100
Shares of common stock repurchased	0.3	3.6	1.4	10.5
Average price of shares repurchased (in dollars per share)	$ 8.37	$ 8.00	$ 8.27	$ 7.98
Stock Repurchased During Period, Value	$ 2,900	$ 28,500	$ 12,000	$ 83,500
Cash dividends declared and paid per share	$ 0.04	$ 0	$ 0.08	$ 0
Payments of Dividends	$ 16,692		$ 33,427	$ 0