Business Combinations (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended		1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2010 Rising Pharmaceuticals Inc. [Member]	Jun. 30, 2013 Rising Pharmaceuticals Inc. [Member]	Mar. 31, 2013 Rising Pharmaceuticals Inc. [Member]	Jun. 30, 2013 Rising Pharmaceuticals Inc. [Member]	Jun. 30, 2012 Rising Pharmaceuticals Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price			$ 73,317
Business acquisition, shares issued			1,000
Business acquisition, value of shares issued			9,000
Business acquisition, cash paid			58,817
Business acquisition, liabilities assumed			5,500
Business acquisition, deferred payment			7,970
Business acquisition, additional consideration payable in one year			1,500
Business acquisition, additional consideration payable in two years			1,470
Business acquisition, additional consideration payable in three years			1,500
Business acquisition, additional consideration payable in four years			3,500
Business acquisition, EBITDA basis used to determine contingent consideration			32,100
Business acquisition, maximum contingent consideration			6,000
Business acquisition, accrued contingent consideration payable							5,346
Business acquisition, additional contingent consideration accrued	$ 3,244	$ 761		$ 404	$ 2,840	$ 3,244