Guarantor Financial Information (Details 4) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Condensed consolidating financial statements
Operating activities	$ 211,745	$ 153,881
Investing activities	(197,194)	(4,398)
Financing activities	(10,348)	(137,000)
NET INCREASE IN CASH AND CASH EQUIVALENTS	4,203	12,483
Beginning of period	26,623	10,726
End of period	30,826	23,209
Issuer
Condensed consolidating financial statements
Operating activities	136,661	85,851
Investing activities	(158,787)	24,790
Financing activities	26,873	(100,050)
NET INCREASE IN CASH AND CASH EQUIVALENTS	4,747	10,591
Beginning of period	19,693	6,030
End of period	24,440	16,621
Guarantor Subsidiaries
Condensed consolidating financial statements
Operating activities	67,603	64,905
Investing activities	(30,796)	(25,837)
Financing activities	(37,331)	(37,406)
NET INCREASE IN CASH AND CASH EQUIVALENTS	(524)	1,662
Beginning of period	6,886	4,696
End of period	6,362	6,358
Non-Guarantor Subsidiaries
Condensed consolidating financial statements
Operating activities	4,652	1,258
Investing activities	(4,782)	(1,484)
Financing activities	110	456
NET INCREASE IN CASH AND CASH EQUIVALENTS	(20)	230
Beginning of period	44	0
End of period	24	230
Adjustments/Eliminations
Condensed consolidating financial statements
Operating activities	2,829	1,867
Investing activities	(2,829)	(1,867)
Financing activities	0	0
NET INCREASE IN CASH AND CASH EQUIVALENTS	0	0
Beginning of period	0	0
End of period	$ 0	$ 0