Earnings Per Common Share - Reconciliation of Earnings Per Share Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												6 Months Ended			9 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, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Earnings Per Share Data [Abstract]
Income (Loss) from Continuing Operations Attributable to Parent	$ 32,785	$ 47,967	$ 32,508	$ 37,538	$ 17,979	$ (12,333)	$ (752)	$ 9,494	$ 16,678	$ 12,205	$ 12,637	$ 10,842	$ 70,046	$ 8,742	$ 23,479	$ 118,013	$ (3,591)	$ 35,684	$ 150,798	$ 14,388	$ 52,362
Convertible debt income adjustments, net of tax (in Dollars)		580	927	1,107									2,034			2,614			3,222
Income from continuing operations adjusted for convertible debt as used for diluted earnings per share (in Dollars)		$ 48,547	$ 33,435	$ 38,645		$ (12,333)	$ (752)	$ 9,494		$ 12,205	$ 12,637	$ 10,842	$ 72,080	$ 8,742	$ 23,479	$ 120,627	$ (3,591)	$ 35,684	$ 154,020	$ 14,388	$ 52,362
Income from continuing operations per share:
Basic (in Dollars per share)	$ 0.27	$ 0.40	$ 0.28	$ 0.33	$ 0.17	$ (0.12)	$ (0.01)	$ 0.10	$ 0.17	$ 0.13	$ 0.13	$ 0.11	$ 0.61	$ 0.09	$ 0.24	$ 1.02	$ (0.04)	$ 0.37	$ 1.29	$ 0.14	$ 0.54
Diluted (1) (in Dollars per share)	$ 0.27	$ 0.39	$ 0.27	$ 0.31	$ 0.16	$ (0.12)	$ (0.01)	$ 0.08	$ 0.13	$ 0.11	$ 0.11	$ 0.10	$ 0.57	$ 0.07	$ 0.21	$ 0.96	$ (0.04)	$ 0.32	$ 1.22	$ 0.13	$ 0.46
Loss from discontinued operations, net of tax (in Dollars)							$ (504)							$ (504)			$ (504)			$ (504)
Loss from discontinued operations, net of tax per share:
Basic (in Dollars per share)														$ (0.01)						$ (0.01)
Weighted average basic shares outstanding	119,390	119,260	115,808	113,352,000	108,515	105,438	103,183	96,633,000	96,431	96,238	96,122	95,926,000	114,587	99,926	96,025	116,162	101,784	96,096	116,980,000	103,480,000	96,181,000
Dilutive securities:
Stock options and unvested RSUs		1,529,000	1,655	2,085,000				4,845,000		4,510	4,380	4,193,000	1,869	5,008	4,383	1,761,000		4,408	1,667,000	4,234,000	4,516,000
Stock warrants								6,843,000		6,687	6,614	6,589,000		3,779	6,564			6,635		1,874,000	6,702,000
Shares issuable on conversion of the Notes (2)		5,102,000	8,456	9,940,000				8,563,000		6,282	5,212	4,843,000	9,194	8,863	5,038	7,815,000		5,505	7,115,000		6,499,000
Total dilutive securities		6,631,000	10,111	12,025,000				20,251,000		17,479	16,206	15,625,000	11,063	17,650	15,985	9,576,000		16,548	8,782,000	6,108,000	17,717,000
Weighted average diluted shares outstanding	125,698	125,891	125,919	125,377,000	124,491	105,438	103,183	116,884,000	113,898	113,717	112,328	111,551,000	125,650	117,576	112,010	125,738	101,784	112,644	125,762,000	109,588,000	113,898,000