Commitments and contingencies: (Tables)

12 Months Ended

Dec. 31, 2013

Commitments and contingencies:

Schedule of future minimum annual payments under capital lease arrangements

The future minimum payments under these agreements are as follows (in thousands):

For the year ending December 31,
2014	$	28,965
2015		22,584
2016		21,714
2017		21,663
2018		21,592
Thereafter		246,032
Total minimum lease obligations		362,550
Less—amounts representing interest		(200,771	)
Present value of minimum lease obligations		161,779
Current maturities		(9,252	)
Capital lease obligations, net of current maturities	$	152,527

Schedule of future minimum annual payments under operating lease and tenant license agreements

Future minimum annual payments under these arrangements are as follows (in thousands):

For the year ending December 31,
2014	$	54,103
2015		44,803
2016		38,160
2017		31,208
2018		27,576
Thereafter		148,031
	$	343,881