Stockholders' Equity - Dividend Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		0 Months Ended	1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Apr. 24, 2014 Subsequent Event [Member]	Feb. 28, 2011 Installment 1 FY 2014 [Member]	Mar. 31, 2014 Installment 1 FY 2014 [Member]	Apr. 03, 2014 Installment 1 FY 2014 [Member] Subsequent Event [Member]	Feb. 28, 2011 Installment 1 FY 2013 [Member]	Mar. 31, 2013 Installment 1 FY 2013 [Member]	Apr. 03, 2013 Installment 1 FY 2013 [Member]	Feb. 28, 2011 Installment 2 FY 2013 [Member]	Mar. 31, 2013 Installment 2 FY 2013 [Member]	Jun. 05, 2013 Installment 2 FY 2013 [Member]	Feb. 28, 2011 Installment 3 FY 2013 [Member]	Mar. 31, 2013 Installment 3 FY 2013 [Member]	Sep. 04, 2013 Installment 3 FY 2013 [Member]	Feb. 28, 2011 Installment 4 FY 2013 [Member]	Mar. 31, 2013 Installment 4 FY 2013 [Member]	Dec. 04, 2013 Installment 4 FY 2013 [Member]
Dividends Payable [Line Items]
Record Date			May 22, 2014		Mar. 20, 2014			Mar. 20, 2013			May 22, 2013			Aug. 21, 2013			Nov. 20, 2013
Payment Date			Jun. 05, 2014		Apr. 03, 2014			Apr. 03, 2013			Jun. 05, 2013			Sep. 04, 2013			Dec. 04, 2013
Per Share Amount	$ 0.035	$ 0.030		$ 0.035			$ 0.030			$ 0.030			$ 0.030			$ 0.030
Dividend Payment	$ 546					$ 546			$ 457			$ 457			$ 460			$ 464