NET INCOME PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Impact Of Equity Awards [Line Items]
Price range of option: from									$ 11.24	$ 10.11	$ 10.52
Price range of option: to									$ 11.78	$ 33.9	$ 48.21
Earnings Per Share, Basic and Diluted [Abstract]
Net Income (Loss) Attributable to Parent	$ 14,088	$ 8,442	$ 6,747	$ (93)	$ 10,850	$ 6,473	$ 8,137	$ 1,363	$ 29,184	$ 26,823	$ 26,024
Preferred stock dividend									752	0	0
Net Income (Loss) Available to Common Stockholders, Basic	$ 13,675	$ 8,103	$ 6,747	$ (93)	$ 10,850	$ 6,473	$ 8,137	$ 1,363	$ 28,432	$ 26,823	$ 26,024
Weighted Average Number Of Shares Outstanding Basic	38,088,000	38,076,000	38,074,000	38,026,000	37,779,000	37,693,000	37,687,000	37,660,000	38,083,947	37,763,353	37,417,807
Earnings Per Share Basic									$ 0.75	$ 0.71	$ 0.7
Incremental Common Shares Attributable to Share-based Payment Arrangements									953,976	900,713	883,688
Weighted Average Number Of Diluted Shares Outstanding	40,974,000	38,913,000	38,929,000	38,026,000	38,730,000	38,482,000	38,446,000	38,501,000	39,037,623	38,664,066	38,301,495
Earnings Per Share Diluted									$ 0.73	$ 0.69	$ 0.68
Options Activity [Member]
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive under the treasury stock method									14,000	30,000	37,000
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									8,000	1,000	4,000
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									165,000	193,000	0
Restricted Stock Units Activity [Member] | Restricted Stock Units Service And Performance Conditions But Performance Not Met [Member]
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive under the treasury stock method									29,000	11,000	0
Restricted Stock Units Activity [Member] | Perpetual Cumulative Convertible Preferred Stock [Member]
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive under the treasury stock method									882,000	0	0