INCOME TAXES (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
Federal		$ 4,332	$ 10,434	$ 1,441
State		1,136	1,697	248
Total		5,468	12,131	1,689
Deferred
Federal		14,068	8,406	25,783
State		2,218	1,117	4,443
Total		16,286	9,523	30,226
Items charged or credited directly to stockholders' equity
Federal		206	123
State		38	20
Total		244	143
Income tax provision	300	21,998	21,797	31,915
Reconciliation of the statutory federal tax provision to income tax provision
Statutory tax rate (as a percent)		35.00%	35.00%	35.00%
Statutory federal provision (35%)		19,520	19,831	14,049
Federal tax provision attributed to predecessor shareholders				(13,754)
Statutory state income tax provision, net of federal tax benefit		2,174	1,983	1,484
State tax provision attributable to predecessor shareholders				(1,453)
Other		304	(17)	2
Recognition of temporary differences upon change in tax status				31,587
Income tax provision	$ 300	$ 21,998	$ 21,797	$ 31,915