NET INCOME PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013
Impact Of Equity Awards [Line Items]
Price range of option: from									$ 11.69	$ 0	$ 11.24
Price range of option: to									$ 13.98	$ 0	$ 11.78
Earnings Per Share, Basic and Diluted [Abstract]
INCOME (LOSS) FROM CONTINUING OPERATIONS	$ 231,829	$ 4,100	$ 6,414	$ (9,331)	$ 11,399	$ 11,420	$ 10,834	$ 4,412	$ 233,013	$ 38,065	$ 29,184
Preferred stock dividend	252	663	550	550	550	526	412	413	2,015	1,901	752
Income available to common shareholders from continuing operations	231,577	3,437	5,864	(9,881)	10,849	10,894	10,422	3,999	230,998	36,164	28,432
Income Loss From Discontinued Operations Net Of Tax	836	0	0	0	0	0	0	0	836	0	0
Net income (loss) available to common shareholders	232,413	3,437	5,864	(9,881)	10,849	10,894	10,422	3,999	233,849	38,065	29,184	$ 29,184
Net Income (Loss) Available to Common Stockholders, Basic	$ 231,577	$ 3,437	$ 5,864	$ (9,881)	$ 10,849	$ 10,894	$ 10,422	$ 3,999	$ 230,998	$ 36,164	$ 28,432
Weighted Average Number Of Shares Outstanding Basic	88,309,000	38,955,000	38,945,000	38,910,000	38,561,000	38,485,000	38,469,000	38,448,000	51,392,899	38,500,495	38,083,947
Incremental Common Shares Attributable to Share-based Payment Arrangements									1,492,257	1,067,567	953,976
Weighted Average Number Of Diluted Shares Outstanding	89,887,000	39,728,000	39,656,000	38,910,000	39,800,000	41,433,000	41,130,000	39,260,000	55,678,189	39,568,062	39,037,623
Basic net income (loss) per common share from continuing operations	$ 2.63	$ 0.11	$ 0.16	$ (0.24)	$ 0.3	$ 0.3	$ 0.28	$ 0.11	$ 4.49	$ 0.94	$ 0.75
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	0.01	0	0	0	0	0	0	0	0.02	0	0
Earnings Per Share Basic	2.63	0.09	0.15	(0.25)	0.28	0.28	0.27	0.1	4.51	0.94	0.75
Income (Loss) from Continuing Operations, Per Diluted Share	2.58	0.28	0.26	0.11	0.28	0.28	0.26	0.11	4.37	0.91	0.73
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share	0.01	0	0	0	0	0	0	0	0.02	0	0
Earnings Per Share Diluted	$ 2.59	$ 0.09	$ 0.15	$ (0.25)	$ 0.27	$ 0.28	$ 0.26	$ 0.1	$ 4.16	$ 0.91	$ 0.73
Options Activity [Member]
Impact Of Equity Awards [Line Items]
Excluded shares as anti-dilutive under the treasury stock method									548,000	0	14,000
Price range of option: from									$ 11.69	$ 0	$ 11.24
Price range of option: to									$ 13.98	$ 0	$ 11.78
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									163,000	0	8,000
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									336,000	267,000	165,000
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	0	29,000
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									0	1,943,000	882,000