INCOME TAXES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current:
Federal	$ 19,270	$ 11,084	$ 18,470
State	2,278	2,173	4,357
Total Current	21,548	13,257	22,827
Deferred:
Federal	6,242	384	1,073
State	2,197	368	1
Total Deferred	8,439	752	1,074
Provision for income taxes	$ 29,987	$ 14,009	$ 23,901
Reconciliation of the federal statutory tax rate to the Company's effective tax rate
Federal statutory tax rate (as a percent)	35.00%	35.00%	35.00%
Increase (decrease) in taxes resulting from:
State income taxes (net of federal effect) (as a percent)	4.30%	5.70%	3.70%
Domestic manufacturing deduction (as a percent)	(2.00%)	(3.00%)	(1.60%)
Adjustments to uncertain tax positions (as a percent)		(2.10%)
Non-deductible acquisition costs (as a percent)		2.30%
Other (as a percent)	(2.00%)	1.60%	2.70%
Provision for income taxes (as a percent)	35.30%	39.50%	39.80%