Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Segment information
Net revenues	$ 652,146	$ 761,371	$ 1,293,226	$ 1,559,617
Income (loss) from operations	23,382	46,881	41,433	180,196
Depreciation and amortization	47,183	80,615	94,549	157,686
Income (loss) from unconsolidated affiliates	1,473	3,821	3,956	5,542
Impairment losses	4,560	71,846	4,560	71,846
Capital expenditures	43,273	53,914	80,314	116,617
Total assets	2,253,858		2,253,858		2,183,991
Investment in and advances to unconsolidated affiliates	187,307		187,307		193,331
Goodwill and other intangible assets, net	867,715		867,715		852,046
East Midwest [Member]
Segment information
Net revenues	361,357	430,943	710,805	889,492
Income (loss) from operations	17,003	97,819	26,605	203,646
Depreciation and amortization	25,911	40,469	52,734	82,157
Impairment losses	4,560		4,560
Capital expenditures	16,988	29,871	27,098	66,942
Total assets	650,200		650,200		590,606
Investment in and advances to unconsolidated affiliates	77		77		79
Goodwill and other intangible assets, net	148,624		148,624		120,458
West [Member]
Segment information
Net revenues	59,033	61,442	119,953	123,594
Income (loss) from operations	7,426	14,260	15,482	26,307
Depreciation and amortization	1,692	3,321	3,241	6,627
Capital expenditures	9,617	1,390	16,047	2,917
Total assets	246,030		246,030		212,098
Goodwill and other intangible assets, net	146,339		146,339		146,012
Southern Plains [Member]
Segment information
Net revenues	224,726	258,761	448,483	527,105
Income (loss) from operations	17,970	(30,619)	39,197	21,419
Depreciation and amortization	17,573	32,730	34,824	60,714
Income (loss) from unconsolidated affiliates	2,621	4,047	5,074	5,784
Impairment losses		71,846		71,846
Capital expenditures	13,990	20,899	33,333	42,229
Total assets	937,986		937,986		945,472
Investment in and advances to unconsolidated affiliates	121,822		121,822		127,749
Goodwill and other intangible assets, net	553,509		553,509		566,016
Corporate Non Segment [Member]
Segment information
Net revenues	7,030	10,225	13,985	19,426
Income (loss) from operations	(19,017)	(34,579)	(39,851)	(71,176)
Depreciation and amortization	2,007	4,095	3,750	8,188
Income (loss) from unconsolidated affiliates	(1,148)	(226)	(1,118)	(242)
Capital expenditures	2,678	1,754	3,836	4,529
Total assets	419,642		419,642		435,815
Investment in and advances to unconsolidated affiliates	65,408		65,408		65,503
Goodwill and other intangible assets, net	$ 19,243		$ 19,243		$ 19,560