Supplemental Cash Flow Information Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2014

Other Significant Noncash Transactions [Line Items]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

	Year ended December 31,
Non-cash financing and investing activities:	2014	2013	2012
Capital lease obligations	24,879	—	1,857
Non-cash acquisitions and related deferred taxes	—	317,826	64,133
Other cash flow information:
Interest paid	30,691	14,139	6,092
Income taxes paid	20,198	26,585	54,680