NET INCOME PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Impact Of Equity Awards [Line Items]
Price range of option: from									$ 0	$ 11.24	$ 10.11
Price range of option: to									$ 0	$ 11.78	$ 33.9
Earnings Per Share, Basic and Diluted [Abstract]
Net Income (Loss) Attributable to Parent	$ 11,399	$ 11,420	$ 10,834	$ 4,412	$ 14,088	$ 8,442	$ 6,747	$ (93)	$ 38,065	$ 29,184	$ 26,823	$ 26,823
Preferred stock dividend	550	413	413	412	413	0	0	0	1,901	752	0
Net Income (Loss) Available to Common Stockholders, Basic	$ 10,849	$ 10,894	$ 10,422	$ 3,999	$ 13,675	$ 8,103	$ 6,747	$ (93)	$ 36,164	$ 28,432	$ 26,823
Weighted Average Number Of Shares Outstanding Basic	38,561,000	38,485,000	38,469,000	38,448,000	38,088,000	38,076,000	38,074,000	38,026,000	38,500,495	38,083,947	37,763,353
Earnings Per Share Basic									$ 0.94	$ 0.75	$ 0.71
Incremental Common Shares Attributable to Share-based Payment Arrangements									1,067,567	953,976	900,713
Weighted Average Number Of Diluted Shares Outstanding	39,800,000	41,433,000	41,130,000	39,260,000	40,974,000	38,913,000	38,929,000	38,026,000	39,568,062	39,037,623	38,664,066
Earnings Per Share Diluted									$ 0.91	$ 0.73	$ 0.69
Options Activity [Member]
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive under the treasury stock method									0	14,000	30,000
Price range of option: from									$ 0	$ 11.24	$ 10.11
Price range of option: to									$ 0	$ 11.78	$ 33.9
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									0	8,000	1,000
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									267,000	165,000	193,000
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									0	29,000	11,000
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									1,943,000	882,000	0