Stockholders' Equity (Narrative) (Detail) (USD $)	6 Months Ended	12 Months Ended	6 Months Ended		1 Months Ended	3 Months Ended	1 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Net Share Settlements	Jun. 30, 2013 Net Share Settlements	Feb. 28, 2014 Restricted Stock	Mar. 31, 2014 Restricted Stock	Mar. 31, 2014 Three-Year Period	Mar. 31, 2013 Three-Year Period	Mar. 31, 2014 Four-Year Period	Mar. 31, 2013 Four-Year Period
Class of Stock [Line Items]
Common stock, shares authorized	80,000,000	80,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock issued from treasury stock	250,000	107,250
Issued common stock for the exercise of stock options		0
Restricted shares of common stock granted							414,900	432,400	294,909	262,000
Restricted shares of common stock vesting period, (in years)						3 years	3 years	3 years	4 years	4 years
Restricted stock granted	1,013,125				283,358
Percentage of target number of shares					106.00%
Treasury shares acquired, shares			250,461	357,714
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0