Schedule I - Financial Information (Balance Sheets) (Parenthetical) (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000us-gaap_PreferredStockSharesAuthorized	10,000,000us-gaap_PreferredStockSharesAuthorized	10,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	90,000,000us-gaap_CommonStockSharesAuthorized	90,000,000us-gaap_CommonStockSharesAuthorized	90,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	37,704,530us-gaap_CommonStockSharesIssued	37,377,274us-gaap_CommonStockSharesIssued	36,687,785us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	37,704,530us-gaap_CommonStockSharesOutstanding	37,377,274us-gaap_CommonStockSharesOutstanding	36,687,785us-gaap_CommonStockSharesOutstanding
Parent Company [Member]
Preferred stock, par value		$ 0.01	$ 0.01
Preferred stock, shares authorized		10,000,000	10,000,000
Preferred stock, shares issued		0	0
Preferred stock, shares outstanding		0	0
Common stock, par value		$ 0.01	$ 0.01
Common stock, shares authorized		90,000,000	90,000,000
Common stock, shares issued		37,377,274	36,687,785
Common stock, shares outstanding		37,377,274	36,687,785

Face amount or stated value per share of common stock.

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