Stockholders' Equity (Changes in Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at March 31, 2014	$ 529
Other comprehensive income before reclassifications	2,575		(2,565)
Amounts reclassified from AOCI	129	[1]	129
Tax effect of other comprehensive income items	(48)		(48)
Net after-tax other comprehensive income	2,656		(2,484)
Balance at June 30, 2014	3,185
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at March 31, 2014	(489)
Amounts reclassified from AOCI	129	[1]
Tax effect of other comprehensive income items	(48)
Net after-tax other comprehensive income	81
Balance at June 30, 2014	(408)
Accumulated Translation Adjustment [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at March 31, 2014	1,018
Other comprehensive income before reclassifications	2,575
Net after-tax other comprehensive income	2,575
Balance at June 30, 2014	$ 3,593

[1] The reclassifications out of AOCI were associated with a loss on a treasury rate lock agreement from July 2010 related to the issuance of the 2015 Notes, which is being reclassified into earnings over the term of the 2015 Notes. The effect on the respective line items of the consolidated statements of earnings impacted by the reclassifications were not material for the three months ended June 30, 2014 and 2013.