SHAREHOLDERS' EQUITY (Detail) (USD $)	2 Months Ended	3 Months Ended					6 Months Ended		8 Months Ended	12 Months Ended		6 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2012	Sep. 30, 2012	Mar. 31, 2013 Incentive Plan [Member]	Mar. 31, 2013 Incentive Stock Options [Member]	Mar. 31, 2013 Restricted Stock [Member]	Dec. 31, 2012 Restricted Stock [Member]	Mar. 31, 2013 Performance Shares [Member]	Dec. 31, 2012 Performance Shares [Member]
Common Stock, Dividends, Per Share, Cash Paid		$ 0.025	$ 0.02	$ 0.02	$ 0.02	$ 0.02				$ 0.08
Dividends Payable, Amount Per Share	$ 0.025	$ 0.025					$ 0.025
Share-based Compensation Arrangement by Share-based Payment Award, Description							Options granted under the Incentive Plan may be either "incentive stock options" or nonqualified stock options, generally expire ten years after the date of grant and are granted at an exercise price of not less than 100% of the fair market value at the date of grant.
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)											3,000,000
Stock Issued During Period, Shares, New Issues (in Shares)												600,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)												674,832
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)													278,330	883,500		829,100
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value (in Dollars)													$ 3,333	$ 9,433,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value													$ 11.97	$ 10.68	$ 241,667
Share-based Compensation (in Dollars)		3,338,000			2,651,000		6,298,000	4,908,000
Stock Repurchase Program, Authorized Amount (in Dollars)									50,000,000
Stock Repurchased During Period, Shares (in Shares)		881,998				723,630
Stock Repurchased During Period, Value (in Dollars)		10,265				7,331,000
Stock Repurchased During Period Per Share		$ 11.64				$ 10.13	$ 9.90
Stock Repurchased Shares Total (in Shares)							2,958,073
Stock Repurchased Value Total (in Dollars)							29,285,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount (in Dollars)							20,715,000
Shares Paid for Tax Withholding for Share Based Compensation (in Shares)	378,157
Shares Paid For Tax Withholding For Share Based Compensation, Value (in Dollars)	$ 4,508,000
Shares Paid For Tax Withholding For Share Based Compensation, Value Per Share	$ 11.92