Segment Information (Tables)

6 Months Ended

Jun. 30, 2015

Segment Reporting [Abstract]

Schedule of segment reporting information, by segment [Table Text Block]

The following tables set forth the Company's operating segments for the three and six months ended June 30, 2015 and 2014 (dollars in thousands):

	Three Months Ended June 30, 2015
	North American Operations		Australian Operations		U.K./European Operations		Total Operations
Operating revenues	$	310,980	$	66,808	$	164,431	$	542,219
Income from operations	$	76,621	$	15,131	$	7,699	$	99,451
Depreciation and amortization	$	34,936	$	7,394	$	5,718	$	48,048
Interest expense, net	$	9,588	$	2,271	$	5,789	$	17,648
Provision for income taxes	$	24,939	$	3,829	$	532	$	29,300
Expenditures for additions to property & equipment, net of grants from outside parties	$	73,440	$	9,159	$	5,028	$	87,627

	Three Months Ended June 30, 2014
	North American Operations		Australian Operations		U.K./European Operations			Total Operations
Operating revenues	$	325,742	$	83,119	$	5,702		$	414,563
Income/(loss) from operations	$	85,387	$	25,331	$	(609	)	$	110,109
Depreciation and amortization	$	30,629	$	7,172	$	411		$	38,212
Interest expense, net	$	13,863	$	3,485	$	225		$	17,573
Provision for/(benefit from) income taxes	$	26,707	$	6,560	$	(700	)	$	32,567
Expenditures for additions to property & equipment, net of grants from outside parties	$	85,315	$	3,047	$	97		$	88,459

	Six Months Ended June 30, 2015
	North American Operations		Australian Operations		U.K./European Operations		Total Operations
Operating revenues	$	628,604	$	126,750	$	183,895	$	939,249
Income from operations	$	133,702	$	29,367	$	9,002	$	172,071
Depreciation and amortization	$	70,241	$	13,620	$	6,404	$	90,265
Interest expense, net	$	20,361	$	4,604	$	6,165	$	31,130
Loss on settlement of foreign currency forward purchase contracts	$	16,374	$	2,312	$	—	$	18,686
Provision for income taxes	$	39,226	$	6,757	$	179	$	46,162
Expenditures for additions to property & equipment, net of grants from outside parties	$	118,710	$	13,774	$	5,041	$	137,525

	Six Months Ended June 30, 2014
	North American Operations		Australian Operations		U.K./European Operations			Total Operations
Operating revenues	$	621,384	$	159,411	$	10,047		$	790,842
Income/(loss) from operations	$	141,979	$	44,266	$	(1,261	)	$	184,984
Depreciation and amortization	$	60,824	$	14,234	$	795		$	75,853
Interest expense, net	$	22,230	$	7,549	$	401		$	30,180
Provision for/(benefit from) income taxes	$	45,865	$	11,003	$	(1,401	)	$	55,467
Expenditures for additions to property & equipment, net of grants from outside parties	$	138,899	$	7,880	$	498		$	147,277

Property and equipment by segment [Table Text Block]

The following tables set forth the property and equipment recorded in the consolidated balance sheets for the Company's operating segments as of June 30, 2015 and December 31, 2014 (dollars in thousands):

	June 30, 2015
	North American Operations		Australian Operations		U.K./European Operations		Total Operations
Property and equipment, net	$	3,352,295	$	485,246	$	266,551	$	4,104,092

	December 31, 2014
	North American Operations		Australian Operations		U.K./European Operations		Total Operations
Property and equipment, net	$	3,269,604	$	506,154	$	12,724	$	3,788,482

Operating revenues by geographic areas [Table Text Block]

Operating revenues for each geographic area for three and six months ended June 30, 2015 and 2014 were as follows (dollars in thousands):

	Three Months Ended June 30, 2015				Three Months Ended June 30, 2014
	Amount		% of Total		Amount		% of Total
Operating revenues:
United States	$	285,688	52.7	%	$	296,026	71.4	%
Non-United States:
Australia	$	66,808	12.3	%	$	83,119	20.0	%
Canada	25,292		4.7	%	29,716		7.2	%
U.K./Europe	164,431		30.3	%	5,702		1.4	%
Total Non-United States	$	256,531	47.3	%	$	118,537	28.6	%
Total operating revenues	$	542,219	100.0	%	$	414,563	100.0	%

	Six Months Ended June 30, 2015				Six Months Ended June 30, 2014
	Amount		% of Total		Amount		% of Total
Operating revenues:
United States	$	576,107	61.3	%	$	563,798	71.3	%
Non-United States:
Australia	$	126,750	13.5	%	$	159,411	20.2	%
Canada	52,497		5.6	%	57,586		7.3	%
U.K./Europe	183,895		19.6	%	10,047		1.2	%
Total Non-United States	$	363,142	38.7	%	$	227,044	28.7	%
Total operating revenues	$	939,249	100.0	%	$	790,842	100.0	%

Property and equipment by geographic areas [Table Text Block]

Property and equipment for each geographic area as of June 30, 2015 and December 31, 2014 were as follows (dollars in thousands):

	June 30, 2015				December 31, 2014
	Amount		% of Total		Amount		% of Total
Property and equipment located in:
United States	$	3,102,630	75.6	%	$	3,003,299	79.3	%
Non-United States:
Australia	$	485,246	11.8	%	$	506,154	13.4	%
Canada	249,665		6.1	%	266,305		7.0	%
U.K./Europe	266,551		6.5	%	12,724		0.3	%
Total Non-United States	$	1,001,462	24.4	%	$	785,183	20.7	%
Total property and equipment, net	$	4,104,092	100.0	%	$	3,788,482	100.0	%