EARNINGS PER SHARE Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended															0 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Restricted Stock [Member]	Dec. 31, 2012 Restricted Stock [Member]	Dec. 31, 2011 Restricted Stock [Member]	Dec. 31, 2013 Stock Appreciation Rights [Member]	Dec. 31, 2012 Stock Appreciation Rights [Member]	Dec. 31, 2011 Stock Appreciation Rights [Member]	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2013 3.25% Convertible Note [Member]	Dec. 31, 2012 3.25% Convertible Note [Member]	Dec. 31, 2011 3.25% Convertible Note [Member]	Nov. 15, 2010 3.25% Convertible Senior Notes due 2016 [Member]	Dec. 31, 2013 Non employee director deferred compensation [Member]	Dec. 31, 2012 Non employee director deferred compensation [Member]	Dec. 31, 2011 Non employee director deferred compensation [Member]
Reconciliation of Weighted-Average Diluted Shares Outstanding
Weighted average common shares outstanding - basic	35,620,000	33,413,000	30,332,000	30,270,000	30,233,000	30,214,000	26,597,000	23,609,000	32,426,000	27,677,000	23,521,000
Incremental Common Shares Attributable to Share-based Payment Arrangements												0	0	307,000	0	0	40,000								0	0	3,000
Weighted Average Number of Shares Outstanding - Diluted	36,836,000	33,413,000	31,014,000	30,270,000	30,233,000	30,214,000	26,728,000	23,889,000	32,426,000	27,677,000	23,871,000
Anti-dilutive Effect
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									1,424,000	820,000	251,000	823,000	694,000	220,000	72,000	116,000	22,000	7,000	7,000	9,000	518,000	0	0		4,000	3,000	0
Convertible Senior Note Due 2016
Convertible Senior Note Principal Amount ($ per Note)																								$ 1,000
3.25% Convertible Note, Number of Shares Convertible																								2,700,000
3.25% Convertible Note, Conversion Price																								$ 42.40