Fair Value of Financial Instruments (Short-term Investments and Financial Instruments at Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012
Assets
Deferred compensation plan investments, current and non-current portion	$ 15,403		$ 13,752
Forward foreign currency exchange contracts	23		308
Total asset at fair value	15,426		14,060
Liabilities [Abstract]
Deferred compensation plan investments, current and non-current portion	15,403		13,752
Forward foreign currency exchange contracts	61		34
Liability for contingent consideration, current and non-current portion	10,736		12,545
Total liabilities at fair value	26,200		26,331
Quoted Prices in Active Markets (Level 1) [Member]
Assets
Deferred compensation plan investments, current and non-current portion	15,403		13,752
Forward foreign currency exchange contracts	0		0
Total asset at fair value	15,403		13,752
Liabilities [Abstract]
Deferred compensation plan investments, current and non-current portion	15,403		13,752
Forward foreign currency exchange contracts	0		0
Liability for contingent consideration, current and non-current portion	0		0
Total liabilities at fair value	15,403		13,752
Significant Other Observable Inputs (Level 2) [Member]
Assets
Deferred compensation plan investments, current and non-current portion	0		0
Forward foreign currency exchange contracts	23		308
Total asset at fair value	23		308
Liabilities [Abstract]
Deferred compensation plan investments, current and non-current portion	0		0
Forward foreign currency exchange contracts	61		34
Liability for contingent consideration, current and non-current portion	0		0
Total liabilities at fair value	61		34
Fair Value, Inputs, Level 3 [Member]
Assets
Deferred compensation plan investments, current and non-current portion	0		0
Forward foreign currency exchange contracts	0		0
Total asset at fair value	0		0
Liabilities [Abstract]
Deferred compensation plan investments, current and non-current portion	0		0
Forward foreign currency exchange contracts	0		0
Liability for contingent consideration, current and non-current portion	10,736	9,547	12,545	13,321	13,090	16,653
Total liabilities at fair value	$ 10,736		$ 12,545