Debt Narrative (Details) (USD $)			12 Months Ended	0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended			9 Months Ended				0 Months Ended															0 Months Ended				0 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012 2012 special cash dividend [Member]	Apr. 30, 2013 Economic Development Loans [Member]	Sep. 30, 2014 Economic Development Loans [Member]	Dec. 31, 2013 Economic Development Loans [Member]	Apr. 30, 2013 Economic Development Loans [Member]	Jun. 27, 2012 $400 Million Senior Notes [Member] Senior Notes [Member]	Sep. 30, 2014 $400 Million Senior Notes [Member] Senior Notes [Member]	Dec. 31, 2013 $400 Million Senior Notes [Member] Senior Notes [Member]	Jun. 27, 2012 $400 Million Senior Notes [Member] Senior Notes [Member]	Aug. 25, 2010 $250 Million Senior Notes [Member] Senior Notes [Member]	Sep. 30, 2014 $250 Million Senior Notes [Member] Senior Notes [Member]	Dec. 31, 2013 $250 Million Senior Notes [Member] Senior Notes [Member]	Aug. 25, 2010 $250 Million Senior Notes [Member] Senior Notes [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member]	Sep. 30, 2014 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member]	Dec. 31, 2013 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] London Interbank Offered Rate (LIBOR) [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Base rate [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Minimum [Member]	Sep. 30, 2014 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Minimum [Member] London Interbank Offered Rate (LIBOR) [Member]	Sep. 30, 2014 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Minimum [Member] Base rate [Member]	Sep. 30, 2014 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Maximum [Member] London Interbank Offered Rate (LIBOR) [Member]	Sep. 30, 2014 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Maximum [Member] Base rate [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Final loan term (Extension) [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Total leverage ratio exceeds 4.50 to 1.00 [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Year 1 [Member] Maximum [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Year 2 [Member] Maximum [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Years 1 and 2 [Member] Minimum [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Year 3 [Member] Minimum [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Year 3 [Member] Maximum [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] After Year 3 [Member] Minimum [Member]	Jul. 25, 2012 $350 Million Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] After Year 3 [Member] Maximum [Member]	Sep. 30, 2014 $200 Million Revolver [Member] Revolver [Member]	Dec. 31, 2013 $200 Million Revolver [Member] Revolver [Member]	Jul. 25, 2012 $200 Million Revolver [Member] Revolver [Member]	Jul. 25, 2012 $200 Million Revolver [Member] Revolver [Member] Letter of credit [Member]	Jul. 25, 2012 $200 Million Revolver [Member] Revolver [Member] Swing-line loans [Member]	Jul. 25, 2012 $200 Million Revolver [Member] Revolver [Member] Alternative currency loans [Member]	Jul. 25, 2012 $150 Million Term Loan [Member] Term Loan [Member]	Sep. 30, 2014 $150 Million Term Loan [Member] Term Loan [Member]	Dec. 31, 2013 $150 Million Term Loan [Member] Term Loan [Member]	Jul. 25, 2012 $150 Million Term Loan [Member] Term Loan [Member]	Jul. 25, 2012 $150 Million Term Loan [Member] Term Loan [Member] Initial loan term [Member]	Jul. 25, 2012 $150 Million Term Loan [Member] Term Loan [Member] Second loan term [Member]	Jul. 25, 2012 $150 Million Term Loan [Member] Term Loan [Member] Final loan term (Extension) [Member]
Debt [Line Items]
Debt instrument issuance date								Jun. 27, 2012				Aug. 25, 2010				Jul. 25, 2012
Debt instrument face amount											$ 400,000,000				$ 250,000,000				$ 350,000,000																										$ 150,000,000
Debt instrument stated interest rate (percentage)							3.00%				5.75%				5.70%
Debt instrument effective interest rate (percentage)					3.00%	3.00%			5.94%	5.94%	5.94%		6.19%	6.19%	6.19%		2.16%	2.17%
Debt instrument maturity date								Jul. 01, 2022				Aug. 28, 2020				Jul. 25, 2016
Debt instrument payment frequency								semi-annually				semi-annually																														quarterly
Payments of special dividends			600,700,000
Senior notes, discount													400,000	400,000	600,000
Revolver maximum borrowing capacity																																						200,000,000	25,000,000	10,000,000	35,000,000
Debt instrument, extension, term																											1 year
Debt instrument, amortization installment payment phases																																														2 years	2 years	1 year
Debt instrument, amortization installment payments, percentage of original principal balance																																														5.00%	7.50%	10.00%
Percentage of ownership in certain domestic subsidiaries included as security by first priority pledges																100.00%
Percentage of ownership in certain foreign and domestic subsidiaries and franchise agreements included as security by first priority pledges																65.00%
Total leverage ratio																						4.50							5.75	5.0			4.5		4.0
Debt instrument additional borrowing capacity																			100,000,000
Debt instrument, description of variable rate basis																				LIBOR	base rate
Debt instrument, basis spread on variable rate (percentage)																							2.00%	1.00%	4.25%	3.25%
Credit facility, unused capacity, commitment fee percentage																0.30%
Credit facility, dividend restriction																												50,000,000
Secured leverage ratio																													2.50	2.25			2.0		1.75
Fixed charge coverage ratio																															2.00	2.25		2.50
Outstanding debt	786,723,000	793,559,000			3,536,000	3,360,000			400,000,000	400,000,000			249,620,000	249,572,000			132,187,000	138,750,000																		0	0						132,200,000	138,800,000
Economic development agreements - total advances agreed upon							4,400,000
Economic development agreements - advances received					3,500,000
Economic development agreements - advances not yet received					$ 900,000
Economic development agreements - measurement frequency				annually
Economic development agreements - term (in years)				10 years