XML 29 R47.htm IDEA: XBRL DOCUMENT

Fair Value Measurements (Details) (USD $)	12 Months Ended
Fair Value Measurements (Details) (USD $)	Dec. 31, 2012 item	Mar. 31, 2013
Extinguishment of Debt [Line Items]
Carrying value of outstanding debt	$ 207,803,000	$ 214,423,000
Number of completed acquisitions	4
Long-Term Debt [Member]
Extinguishment of Debt [Line Items]
Fair value of outstanding debt		227,286,000
Carrying value of outstanding debt		$ 214,423,000
Senior Subordinated Notes, interest rate		6.25%

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References+ Details