Stockholders' Equity (Deficit) - Analysis of Stockholder's (Deficit) Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 23, 2017	Jun. 24, 2017	Mar. 25, 2017	Dec. 31, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				$ 211,749				$ (17,139)	$ 211,749	$ (17,139)	$ (62,412)
Net Income	$ 295,077	$ 15,672	$ 4,573	$ 9,642	$ 11,486	$ 21,567	$ 19,340	$ 20,893	324,964	73,286	55,257
Other comprehensive loss, net of tax									33,929	(460)	(6,176)
Reclassification to additional paid-in capital											864
Issuance of preferred stock										166,609
Common stock issued at Acquisition									141,192
Issuance of common stock under incentive stock plans									14	0	8
Stock-based compensation									8,986	7,217	9,832
Excess tax deficit on stock-based compensation										(1,228)	(2,558)
Repurchase of common stock									(157)	(388)	(12)
Common stock dividends									(13,121)	(12,507)	(11,942)
Preferred stock dividends									(13,800)	(3,641)
Ending balance	$ 693,756				$ 211,749				$ 693,756	$ 211,749	$ (17,139)
Common stock dividends (in dollars per share)									$ 0.28	$ 0.28	$ 0.28
Preferred stock dividends (in dollars per share)									$ 8.00	$ 2.11
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)				43,261,905				42,872,435	43,261,905	42,872,435	42,616,319
Beginning balance				$ 433				$ 429	$ 433	$ 429	$ 426
Common stock issued at Acquisition (in shares)									8,439,452
Common stock issued at Acquisition									$ 84
Issuance of common stock under incentive stock plans (shares)									27,131	422,941	258,176
Issuance of common stock under incentive stock plans									$ 0	$ 4	$ 3
Repurchase of common stock (shares)									(11,346)	(33,471)	(2,060)
Repurchase of common stock									$ 0	$ 0	$ 0
Ending balance (in shares)	51,717,142				43,261,905				51,717,142	43,261,905	42,872,435
Ending balance	$ 517				$ 433				$ 517	$ 433	$ 429
Preferred Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)				1,725,000				0	1,725,000	0	0
Beginning balance				$ 17				$ 0	$ 17	$ 0	$ 0
Issuance of preferred stock (in shares)										1,725,000
Issuance of preferred stock										$ 17
Ending balance (in shares)	1,725,000				1,725,000				1,725,000	1,725,000	0
Ending balance	$ 17				$ 17				$ 17	$ 17	$ 0
Additional Paid in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				242,402				70,213	242,402	70,213	62,082
Reclassification to additional paid-in capital											864
Issuance of preferred stock										166,592
Common stock issued at Acquisition									141,108
Issuance of common stock under incentive stock plans									14	(4)	5
Stock-based compensation									8,986	7,217	9,832
Excess tax deficit on stock-based compensation										(1,228)	(2,558)
Repurchase of common stock									(157)	(388)	(12)
Ending balance	392,353				242,402				392,353	242,402	70,213
Retained Earnings (Accumulated Deficit)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				78,977				21,839	78,977	21,839	(21,476)
Net Income									324,964	73,286	55,257
Common stock dividends									(13,121)	(12,507)	(11,942)
Preferred stock dividends									(13,800)	(3,641)
Ending balance	377,020				78,977				377,020	78,977	21,839
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				$ (110,080)				$ (109,620)	(110,080)	(109,620)	(103,444)
Other comprehensive loss, net of tax									33,929	(460)	(6,176)
Ending balance	$ (76,151)				$ (110,080)				$ (76,151)	$ (110,080)	$ (109,620)