Earnings per Share - Schedule of Computation of Basic and Diluted EPS (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended		6 Months Ended
	May 15, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Net Income		$ 19,792	$ 14,783	$ 41,559	$ 28,968
Noncontrolling interests		(249)	602	(78)	377
Net Income Attributable to Common Stockholders		$ 19,543	$ 15,385	$ 41,481	$ 29,345
Shares:
Basic: Weighted-average number of shares outstanding		9,133	7,821	9,125	7,821
Plus: Incremental shares from assumed conversion of dilutive instruments		192	237	218	252
Diluted: Weighted-average number of shares outstanding		9,325	8,058	9,343	8,073
Earnings per share - basic		$ 2.14	$ 1.97	$ 4.55	$ 3.75
Earnings per share - diluted		$ 2.10	$ 1.91	$ 4.44	$ 3.64
Cash dividends declared per share	$ 0.45	$ 0.45	$ 0.00	$ 0.45	$ 0.00