STOCK BASED COMPENSATION (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based award expense	$ 2,845		$ 2,483		$ 1,666
Related tax benefits recognized in earnings	932		1,014		681
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based award expense	526		662		436
Stock options [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based award expense	19		65		63
Restricted stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based award expense	1,968	[1]	1,502	[1]	1,018	[1]
Restricted stock awards [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based award expense	$ 332		$ 254		$ 149

[1] Inclusive of compensation expense associated with time-vested and performance-based restricted stock awards.