Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]
Balance at Jan. 02, 2011	$ 1,066,124		$ 1,143	$ 1,094,713	$ 6,564	$ (33,732)	$ (2,564)
Net income	87,047				87,047
Change in other comprehensive income (loss), net of tax	(11,416)					(11,416)
Common dividends declared: $0.48/share	(60,686)				(60,686)
Issuance of common stock	124,378		125	125,107			(854)
Restricted stock compensation	4,813			4,813
Tax benefit of stock-based compensation	(61)			(61)
Balance at Dec. 31, 2011	1,210,199		1,268	1,224,572	32,925	(45,148)	(3,418)
Net income	110,410				110,410
Change in other comprehensive income (loss), net of tax	(1,076)					(1,076)
Common dividends declared: $0.48/share	(67,646)				(67,646)
Issuance of common stock	146,038		130	147,885	(377)		(1,600)
Restricted stock compensation	3,758			3,758
Tax benefit of stock-based compensation	386			386
Balance at Dec. 31, 2012	1,402,069		1,398	1,376,601	75,312	(46,224)	(5,018)
Net income	117,804				117,804
Change in other comprehensive income (loss), net of tax	(10,700)					(10,700)
Common dividends declared: $0.48/share	(71,246)				(71,246)
Issuance of preferred stock	106,882	106,882
Issuance of common stock	223,006		194	224,948			(2,136)
Restricted stock compensation	5,242			5,242
Tax benefit of stock-based compensation	1,326			1,326
Balance at Dec. 31, 2013	$ 1,774,383	$ 106,882	$ 1,592	$ 1,608,117	$ 121,870	$ (56,924)	$ (7,154)