Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2012

Transactions with Lovell Minnick Partners [Member]

Related Party Transaction [Line Items]

Schedule of related party transactions, by related party [Table Text Block]

D&P Acquisitions made distributions to entities affiliated with Lovell Minnick Partners as summarized in the following table:

	Year Ended
	December 31, 2012		December 31, 2011		December 31, 2010
Distributions for taxes	$	379	$	1,485	$	1,890
Other distributions	200		1,157		831
Payments pursuant to the Tax Receivable Agreement	—		1,370		1,145
	$	579	$	4,012	$	3,866

Transactions with Vestar Capital Partners [Member]

Related Party Transaction [Line Items]

Schedule of related party transactions, by related party [Table Text Block]

D&P Acquisitions made distributions to entities affiliated with Vestar Capital Partners as summarized in the following table:

	Year Ended
	December 31, 2012		December 31, 2011		December 31, 2010
Distributions for taxes	$	1,216	$	2,058	$	2,618
Other distributions	876		1,608		1,156
Payments pursuant to the Tax Receivable Agreement	1,901		1,848		1,629
	$	3,993	$	5,514	$	5,403