NET INCOME PER COMMON SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive when reporting loss	0		0	0
Earnings Per Share, Basic and Diluted [Abstract]
Net Income (Loss) Attributable to Parent	$ 6,875	$ 8,177	$ 16,517	$ 3,921	$ 11,268
Weighted Average Number Of Shares Outstanding Basic	37,385,753	36,735,215	37,334,620	36,704,001
Earnings Per Share Basic	$ 0.18	$ 0.22	$ 0.44	$ 0.11
Incremental Common Shares Attributable to Share-based Payment Arrangements	767,669	812,430	874,359	958,183
Weighted Average Number Of Diluted Shares Outstanding	38,153,422	37,547,645	38,208,979	37,662,184
Earnings Per Share Diluted	$ 0.18	$ 0.22	$ 0.43	$ 0.10
Options Activity [Member]
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive under the treasury stock method	36	49	38	51
Price range of option: from	$ 8.79	$ 6.34	$ 8.79	$ 6.36
Price range of option: to	$ 48.21	$ 48.21	$ 48.21	$ 48.21
Restricted Stock Units Activity [Member]
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive under the treasury stock method	206	1,156	442	1,309
Restricted Stock Units Activity [Member] | Restricted Stock Units Service Conditions [Member]
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive under the treasury stock method	6	956	242	1,109
Restricted Stock Units Activity [Member] | Restricted Stock Units Service And Market Conditions But Market Not Met [Member]
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive under the treasury stock method	200	200	200	200