Segment Information (Tables)

3 Months Ended

6 Months Ended

Jun. 30, 2011

Jun. 30, 2011

Jun. 30, 2010

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The following table sets forth our North American & European Operations and Australian Operations for the three months ended June 30, 2011 and 2010 (dollars in thousands):

	Three Months Ended June 30, 2011									Three Months Ended June 30, 2010
	North American & European Operations			Australian Operations			Total Operations			North American & European Operations			Australian Operations		Total Operations
Revenues	$	139,335		$	70,254		$	209,589		$	127,004		$	31,449	$	158,453
Income from operations	33,737			17,428			51,165			31,153			6,720		37,873
Depreciation and amortization	11,565			4,732			16,297			10,908			1,544		12,452
Interest expense	(5,935		)	(4,318		)	(10,253		)	(5,411		)	—		(5,411		)
Interest income	791			67			858			56			415		471
Provision for income taxes	7,485			3,935			11,420			9,981			2,086		12,067
Expenditures for additions to property & equipment, net of grants from outside parties	14,742			27,412			42,154			5,181			1,204		6,385

The following table sets forth our North American & European Operations and Australian Operations for the six months ended June 30, 2011 and 2010 (dollars in thousands):

	Six Months Ended June 30, 2011									Six Months Ended June 30, 2010
	North American & European Operations			Australian Operations			Total Operations			North American & European Operations			Australian Operations		Total Operations
Revenues	$	271,642		$	129,858		$	401,500		$	244,240		$	59,792	$	304,032
Income from operations	60,672			29,696			90,368			55,164			12,815		67,979
Depreciation and amortization	22,911			9,247			32,158			21,823			3,077		24,900
Interest expense	(11,891		)	(8,301		)	(20,192		)	(10,773		)	—		(10,773		)
Interest income	1,507			126			1,633			111			783		894
Provision for income taxes	13,557			6,348			19,905			17,692			4,016		21,708
Expenditures for additions to property & equipment, net of grants from outside parties	21,811			28,554			50,365			5,877			4,736		10,613

Property and Equipment by Segment [Table Text Block]

The following table sets forth the property and equipment recorded in the consolidated balance sheets as of June 30, 2011 and December 31, 2010 (dollars in thousands):

	June 30, 2011			December 31, 2010
	North American & European Operations	Australian Operations	Total Operations	North American & European Operations	Australian Operations	Total Operations
Property & equipment	$1,012,010	$491,378	$1,503,388	$1,000,350	$443,827	$1,444,177