NET INCOME PER COMMON SHARE Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	11,030		13,331
Net Income (Loss) Available to Common Stockholders, Basic	$ 9,023	$ 10,303	$ 17,847	$ 20,728
Weighted Average Number of Shares Outstanding, Basic	11,298,000	11,243,000	11,292,000	11,236,000
Earnings Per Share, Basic	$ 0.80	$ 0.92	$ 1.58	$ 1.84
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	7,000	31,000	5,000	28,000
Net Income (Loss) Available to Common Stockholders, Diluted	$ 9,023	$ 10,303	$ 17,847	$ 20,728
Weighted Average Number of Shares Outstanding, Diluted	11,305,000	11,274,000	11,297,000	11,264,000
Earnings Per Share, Diluted	$ 0.80	$ 0.91	$ 1.58	$ 1.84