Earnings per Common Share (Details) - Reconciliation of Earnings Per Share Data - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Income from continuing operations used for basic earnings per share (in Dollars)	$ 184,243	$ 150,798	$ 14,388
Exclusion of interest and deferred financing fees from diluted income (in dollars)	1,000	3,200
Convertible debt income adjustments, net of tax (in Dollars)		3,222	0
Income from continuing operations adjusted for convertible debt as used for diluted earnings per share (in Dollars)	$ 185,292	$ 154,020	$ 14,388
Income from continuing operations per share:
Basic (in Dollars per share)	$ 1.50	$ 1.29	$ 0.14
Diluted (in Dollars per share)	$ 1.47	$ 1.22	$ 0.13
Loss from discontinued operations, net of tax (in Dollars)	$ 0	$ 0	$ (504)
Loss from discontinued operations, net of tax per share:
Basic (in Dollars per share)	$ 0.00	$ 0.00	$ (0.01)
Shares used in computing income (loss) per share:
Weighted average basic shares outstanding	122,869	116,980	103,480
Dilutive securities:
Stock options and unvested RSAs	914	1,667	4,234
Stock warrants	0	0	1,874
Shares issuable on conversion of the Notes (2)	2,018	7,115	0
Total dilutive securities	2,932	8,782	6,108
Weighted average diluted shares outstanding	125,801	125,762	109,588