NET INCOME PER COMMON SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
NET INCOME PER COMMON SHARE
Net income	$ 5,997	$ 9,490
Shares of common stock outstanding used to compute basic per common share amounts	35,076,828	34,598,494
Effect of dilutive restricted stock and options (in shares)	338,190	467,538
Shares used to compute dilutive per common share amounts	35,415,018	35,066,032
Basic income per share (in dollars per share)	$ 0.17	$ 0.27
Diluted income per share (in dollars per share)	$ 0.17	$ 0.27
Anti-dilutive options (in shares)	0	0