Capital Stock (Narrative) (Detail) - $ / shares shares in Thousands	Feb. 02, 2017	Dec. 22, 2016	Dec. 01, 2016	Sep. 20, 2016	Aug. 25, 2016	Mar. 24, 2017	Dec. 31, 2016	Jun. 30, 2016	May 08, 2014
Dividends Payable [Line Items]
Common stock, shares authorized							75,000	75,000
Preferred stock, shares authorized							2,000	2,000
Dividends declared, per share amount			$ 0.065		$ 0.065
Dividend paid, per share amount		$ 0.065		$ 0.065
Dividends declared, date of declaration			Dec. 01, 2016		Aug. 25, 2016
Dividend paid, date			Dec. 22, 2016		Sep. 20, 2016
Dividends declared, date of record			Dec. 12, 2016		Sep. 09, 2016
Subsequent Event
Dividends Payable [Line Items]
Dividends declared, per share amount	$ 0.065
Dividends to be paid, per share amount						$ 0.065
Dividends declared, date of declaration	Feb. 02, 2017
Dividends payable, date to be paid	Mar. 24, 2017
Dividends declared, date of record	Mar. 10, 2017
Stock repurchase program
Dividends Payable [Line Items]
Number of shares authorized to be repurchased									5,000