Derivative Financial Instruments Schedule of Derivatives (Details)	3 Months Ended		6 Months Ended
	Jun. 28, 2015 USD ($) contract	Jun. 29, 2014 USD ($)	Jun. 28, 2015 USD ($) contract	Jun. 29, 2014 USD ($)
Derivative [Line Items]
Net effect of swaps	$ 1,407,000	$ 315,000	$ 1,523,000	$ (56,000)
Debt instrument, LIBOR floor, decrease to percent	1.00%		1.00%
Debt instrument, LIBOR floor, decrease from percent	1.50%		1.50%
Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 12 [Member]
Derivative [Line Items]
Notional amount	$ 200,000,000		$ 200,000,000
Fixed interest rate	3.00%		3.00%
Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 13 [Member]
Derivative [Line Items]
Notional amount	$ 100,000,000		$ 100,000,000
Fixed interest rate	3.00%		3.00%
Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 14 [Member]
Derivative [Line Items]
Notional amount	$ 100,000,000		$ 100,000,000
Fixed interest rate	2.996%		2.996%
Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 15 [Member]
Derivative [Line Items]
Notional amount	$ 100,000,000		$ 100,000,000
Fixed interest rate	2.70%		2.70%
Interest Rate Swap [Member]
Derivative [Line Items]
Amortization of Deferred Hedge Gains	$ 1,700,000	2,000,000	$ 3,400,000	4,000,000
Cash Flow Hedging [Member] | Forward-Starting Interest Rate Swap [Member]
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	$ 1,500,000		$ 1,500,000
Cash Flow Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | 2013 forwards [Member]
Derivative [Line Items]
Average rate	2.94%		2.94%
Derivative, amount of hedged item	$ 500,000,000		$ 500,000,000
Number of derivative instruments | contract	4		4
Designated As Hedging [Member]
Derivative [Line Items]
Notional amount	$ 500,000,000		$ 500,000,000
Fixed interest rate	2.94%		2.94%
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 0		$ 0
Designated As Hedging [Member] | Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	446,000	(4,622,000)	(4,156,000)	(7,364,000)
Not Designated As Hedging [Member]
Derivative [Line Items]
Notional amount	$ 800,000,000		$ 800,000,000
Average rate	2.38375%		2.38375%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 1 [Member]
Derivative [Line Items]
Notional amount	$ 200,000,000		$ 200,000,000
Fixed interest rate	2.27%		2.27%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 2 [Member]
Derivative [Line Items]
Notional amount	$ 150,000,000		$ 150,000,000
Fixed interest rate	2.427%		2.427%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 3 [Member]
Derivative [Line Items]
Notional amount	$ 75,000,000		$ 75,000,000
Fixed interest rate	2.298%		2.298%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 4 [Member]
Derivative [Line Items]
Notional amount	$ 70,000,000		$ 70,000,000
Fixed interest rate	2.54%		2.54%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 5 [Member]
Derivative [Line Items]
Notional amount	$ 50,000,000		$ 50,000,000
Fixed interest rate	2.54%		2.54%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 6 [Member]
Derivative [Line Items]
Notional amount	$ 50,000,000		$ 50,000,000
Fixed interest rate	2.54%		2.54%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 7 [Member]
Derivative [Line Items]
Notional amount	$ 50,000,000		$ 50,000,000
Fixed interest rate	2.427%		2.427%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 8 [Member]
Derivative [Line Items]
Notional amount	$ 50,000,000		$ 50,000,000
Fixed interest rate	2.293%		2.293%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 9 [Member]
Derivative [Line Items]
Notional amount	$ 50,000,000		$ 50,000,000
Fixed interest rate	2.293%		2.293%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 10 [Member]
Derivative [Line Items]
Notional amount	$ 30,000,000		$ 30,000,000
Fixed interest rate	2.54%		2.54%
Not Designated As Hedging [Member] | Forward-Starting Interest Rate Swap [Member] | Forward Starting Interest Rate Swap 11 [Member]
Derivative [Line Items]
Notional amount	$ 25,000,000		$ 25,000,000
Fixed interest rate	2.298%		2.298%
Credit Agreement 2013 [Member] [Domain] | Senior Secured Term Loan [Member]
Derivative [Line Items]
Interest rate LIBOR floor	0.75%		0.75%
Net Effect of Swaps [Member] | Not Designated As Hedging [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 3,093,000	$ 2,301,000	$ 4,896,000	$ 3,918,000